====================================================
Tetrakis(trimethylsilyl)butatriene Dianion Dilithium (Monomer) (5)

      Table 1.  Crystal data and structure refinement for monomer.

Identification code				shelxl

Empirical formula					C32 H68 Li2 O4 Si4

Formula weight 					643.10

Temperature					120(2) K

Wavelength						0.71070

Crystal system, space group			Orthorhombic, Pca21(#29)

Unit cell dimensions				a = 30.995(2) 
	� =
90.000(0)�
							b = 11.641(1)
	b = 90.000(0)�
							c = 23.248(2)
	g = 90.000(0)�

Volume						8388(1) 3

Z, Calculated density 				8,  1.018 g cm�3

Absorption coefficient				0.170 mm�1

F(000)						2832

Crystal size						0.45 x 0.40 x 0.30 mm

Theta range for data collection		2.06 to 27.89

Limiting indices					0 < = h < = 40, 0 <
= k < = 15, �30 < = l < = 0

Reflections collected / unique    		10805 / 10179

Completeness to theta				27.89     99.0 %

Refinement method                			 Full-matrix
least-squares on F2

Data / restraints / parameters    		10179 / 0 / 756

Goodness-of-fit on F2            		1.032

Final R indices [I > 2sigma(I)]     		R1 = 0.0740, wR2 = 0.1726

R indices (all data)				R1 = 0.1281, wR2 = 0.2150

Absolute structure parameter     		0.1(2)

Extinction coefficient				0.0028(4)

Largest diff. peak and hole			0.400 and �0.362 e �3

     Table 2.  Atomic coordinates ( x 10^4) and equivalent isotropic
         displacement parameters (A^2 x 10^3) for monomer.
         U(eq) is defined as one third of the trace of the orthogonalized
         Uij tensor.

         ________________________________________________________________

                         x             y             z           U(eq)
         ________________________________________________________________

          C(1)         2301(2)       2578(6)       1429(3)       43(1)
          C(2)         2537(2)       3596(5)       1591(3)       39(1)
          C(3)         2796(2)       4277(5)       1816(3)       36(1)
          C(4)         3021(2)       5299(6)       2004(3)       41(2)
          C(5)         1603(3)       3227(8)       2311(4)       65(2)
          C(6)         1469(3)       1149(8)       1539(5)       72(2)
          C(7)         1397(3)       3592(8)       1068(4)       72(2)
          C(8)         2530(5)        106(7)       1024(5)       83(3)
          C(9)         3039(3)       2121(8)        596(5)       84(3)
          C(10)        2148(4)       1701(11)       178(4)      102(4)
          C(11)        3383(3)       7522(7)       1491(5)       82(3)
          C(12)        3476(3)       5275(8)        845(4)       65(2)
          C(13)        4008(3)       5794(9)       1883(5)       83(3)
          C(14)        2459(3)       5142(9)       3097(4)       73(3)
          C(15)        3151(3)       6988(8)       3015(4)       74(3)
          C(16)        3388(3)       4558(9)       3194(4)       80(3)
          C(17)        2771(5)       1598(9)       3418(4)      110(5)
          C(18)        2747(7)        351(13)      3634(6)      170(9)
          C(19)        2417(4)       -167(9)       3287(6)       95(3)
          C(20)        2260(4)        668(10)      2891(6)      104(4)
          C(21)        3711(3)       2430(7)       1988(5)       79(3)
          C(22)        4087(3)       1845(12)      2239(6)      102(4)
          C(23)        3944(3)        642(10)      2339(6)      100(4)
          C(24)        3481(3)        594(8)       2187(6)       84(3)
          C(25)        2280(4)       5124(9)        290(4)       88(4)
          C(26)        2412(5)       5667(18)      -244(5)      151(8)
          C(27)        2394(6)       6932(18)      -129(9)      177(9)
          C(28)        2280(5)       7035(9)        479(6)      123(5)
          C(29)        2048(3)       7649(9)       2200(5)       85(3)
          C(30)        1634(3)       8029(11)      2414(5)      101(4)
          C(31)        1322(4)       7633(13)      1980(6)      130(6)
          C(32)        1499(3)       6599(9)       1723(4)       78(3)
          C(51)        5528(2)      10094(5)       4332(3)       42(2)
          C(52)        5309(2)       9071(5)       4519(3)       35(1)
          C(53)        5051(2)       8394(5)       4738(3)       38(1)
          C(54)        4798(2)       7383(5)       4886(3)       41(1)
          C(55)        5882(4)      12303(7)       4924(5)       95(4)
          C(56)        5968(3)      10001(8)       5523(5)       69(3)
          C(57)        6518(3)      10579(9)       4473(5)       85(3)
          C(58)        5941(3)       9463(8)       3152(4)       74(3)
          C(59)        5002(4)      10012(9)       3240(4)       66(2)
          C(60)        5668(3)      11901(8)       3391(5)       80(3)
          C(61)        3918(3)       8458(8)       5219(4)       75(3)
          C(62)        4139(3)       8146(10)      3982(4)       78(3)
          C(63)        3938(3)       6099(9)       4724(5)       87(3)
          C(64)        5534(3)       6822(8)       5717(4)       74(2)
          C(65)        4994(5)       4890(8)       5287(6)       89(3)
          C(66)        4629(4)       6495(10)      6136(4)       98(4)
          C(67)        4811(5)       9901(11)      6047(5)      105(4)
          C(68)        4881(8)      10500(20)      6540(6)      248(16)
          C(69)        4854(6)      11670(20)      6438(10)     212(12)
          C(70)        4721(5)      11811(10)      5819(7)      131(6)
          C(71)        4006(3)      11349(10)      4532(6)       97(4)
          C(72)        3833(3)      12312(12)      4230(7)      128(6)
          C(73)        4165(3)      12996(11)      4077(9)      165(9)
          C(74)        4569(3)      12435(7)       4157(4)       65(2)
          C(75)        4770(4)       5478(10)      3387(5)       95(4)
          C(76)        4940(4)       4757(8)       2911(5)       94(4)
          C(77)        5186(4)       5539(11)      2546(5)      102(4)
          C(78)        5242(5)       6599(10)      2874(5)      122(5)
          C(79)        5958(4)       5376(9)       4081(8)      119(5)
          C(80)        6419(3)       5342(10)      3993(7)      100(4)
          C(81)        6574(3)       6524(12)      4097(6)      102(4)
          C(82)        6204(2)       7172(8)       4336(5)       75(3)
          Li(1)        2744(4)       2298(10)      2168(5)       47(3)
          Li(2)        2412(4)       5653(11)      1545(5)       52(3)
          Li(51)       4910(4)      10413(10)      4777(5)       54(3)
          Li(52)       5250(4)       7121(11)      4161(5)       48(3)
          O(1)         2558(2)       1595(5)       2887(2)       64(1)
          O(2)         3343(2)       1752(4)       2142(3)       57(1)
          O(3)         2318(2)       5945(5)        730(2)       64(2)
          O(4)         1958(2)       6614(5)       1865(3)       68(2)
          O(51)        4814(2)      10709(5)       5591(2)       70(2)
          O(52)        4466(2)      11375(5)       4441(3)       72(2)
          O(53)        5058(2)       6443(4)       3424(2)       58(1)
          O(54)        5830(2)       6526(4)       4176(3)       61(1)
          Si(1)        1722(1)       2639(2)       1577          51(1)
          Si(2)        2498(1)       1676(2)        841(1)       52(1)
          Si(3)        3445(1)       5939(2)       1580(1)       50(1)
          Si(4)        3003(1)       5497(2)       2791          51(1)
          Si(51)       5955(1)      10714(2)       4801(1)       54(1)
          Si(52)       5535(1)      10356(2)       3574(1)       48(1)
          Si(53)       4228(1)       7514(2)       4713(1)       56(1)
          Si(54)       4981(1)       6450(2)       5473(1)       51(1)
         ________________________________________________________________

           Table 3.  Bond lengths [� and angles [deg] for monomer.
           _____________________________________________________________

            C(1)-C(2)                     1.442(9)
            C(1)-Si(2)                    1.829(7)
            C(1)-Si(1)                    1.829(7)
            C(1)-Li(1)                    2.222(14)
            C(2)-C(3)                     1.244(8)
            C(2)-Li(1)                    2.119(14)
            C(2)-Li(2)                    2.428(14)
            C(3)-C(4)                     1.446(9)
            C(3)-Li(2)                    2.092(14)
            C(3)-Li(1)                    2.450(13)
            C(4)-Si(3)                    1.805(7)
            C(4)-Si(4)                    1.844(7)
            C(4)-Li(2)                    2.207(13)
            C(5)-Si(1)                    1.876(8)
            C(5)-H(5A)                    0.9613
            C(5)-H(5B)                    0.9607
            C(5)-H(5C)                    0.9600
            C(6)-Si(1)                    1.906(8)
            C(6)-H(6A)                    0.9595
            C(6)-H(6B)                    0.9606
            C(6)-H(6C)                    0.9612
            C(7)-Si(1)                    1.909(9)
            C(7)-H(7A)                    0.9592
            C(7)-H(7B)                    0.9605
            C(7)-H(7C)                    0.9605
            C(8)-Si(2)                    1.878(9)
            C(8)-H(8A)                    0.9608
            C(8)-H(8B)                    0.9606
            C(8)-H(8C)                    0.9600
            C(9)-Si(2)                    1.845(9)
            C(9)-H(9A)                    0.9597
            C(9)-H(9B)                    0.9606
            C(9)-H(9C)                    0.9613
            C(10)-Si(2)                   1.887(10)
            C(10)-H(10A)                  0.9585
            C(10)-H(10B)                  0.9603
            C(10)-H(10C)                  0.9595
            C(11)-Si(3)                   1.863(9)
            C(11)-H(11A)                  0.9596
            C(11)-H(11B)                  0.9615
            C(11)-H(11C)                  0.9606
            C(12)-Si(3)                   1.878(10)
            C(12)-H(12A)                  0.9607
            C(12)-H(12B)                  0.9599
            C(12)-H(12C)                  0.9602
            C(13)-Si(3)                   1.890(9)
            C(13)-H(13A)                  0.9607
            C(13)-H(13B)                  0.9588
            C(13)-H(13C)                  0.9602
            C(14)-Si(4)                   1.876(10)
            C(14)-H(14A)                  0.9602
            C(14)-H(14B)                  0.9603
            C(14)-H(14C)                  0.9601
            C(15)-Si(4)                   1.869(9)
            C(15)-H(15A)                  0.9603
            C(15)-H(15B)                  0.9610
            C(15)-H(15C)                  0.9611
            C(16)-Si(4)                   1.870(10)
            C(16)-H(16A)                  0.9603
            C(16)-H(16B)                  0.9608
            C(16)-H(16C)                  0.9592
            C(17)-O(1)                    1.400(11)
            C(17)-C(18)                   1.537(16)
            C(17)-H(17A)                  0.9607
            C(17)-H(17B)                  0.9593
            C(18)-C(19)                   1.436(17)
            C(18)-H(18A)                  0.9600
            C(18)-H(18B)                  0.9599
            C(19)-C(20)                   1.425(15)
            C(19)-H(19A)                  0.9603
            C(19)-H(19B)                  0.9596
            C(20)-O(1)                    1.422(10)
            C(20)-H(20A)                  0.9595
            C(20)-H(20B)                  0.9596
            C(21)-O(2)                    1.433(9)
            C(21)-C(22)                   1.469(14)
            C(21)-H(21A)                  0.9605
            C(21)-H(21B)                  0.9606
            C(22)-C(23)                   1.488(16)
            C(22)-H(22A)                  0.9600
            C(22)-H(22B)                  0.9591
            C(23)-C(24)                   1.479(14)
            C(23)-H(23A)                  0.9601
            C(23)-H(23B)                  0.9591
            C(24)-O(2)                    1.418(9)
            C(24)-H(24A)                  0.9600
            C(24)-H(24B)                  0.9590
            C(25)-O(3)                    1.406(10)
            C(25)-C(26)                   1.451(18)
            C(25)-H(25A)                  0.9596
            C(25)-H(25B)                  0.9587
            C(26)-C(27)                   1.50(2)
            C(26)-H(26A)                  0.9597
            C(26)-H(26B)                  0.9594
            C(27)-C(28)                   1.46(2)
            C(27)-H(27A)                  0.9599
            C(27)-H(27B)                  0.9595
            C(28)-O(3)                    1.401(11)
            C(28)-H(28A)                  0.9605
            C(28)-H(28B)                  0.9593
            C(29)-C(30)                   1.447(13)
            C(29)-O(4)                    1.462(10)
            C(29)-H(29A)                  0.9590
            C(29)-H(29B)                  0.9596
            C(30)-C(31)                   1.473(14)
            C(30)-H(30A)                  0.9599
            C(30)-H(30B)                  0.9604
            C(31)-C(32)                   1.452(13)
            C(31)-H(31A)                  0.9608
            C(31)-H(31B)                  0.9583
            C(32)-O(4)                    1.457(10)
            C(32)-H(32A)                  0.9610
            C(32)-H(32B)                  0.9598
            C(51)-C(52)                   1.438(9)
            C(51)-Si(52)                  1.788(8)
            C(51)-Si(51)                  1.861(7)
            C(51)-Li(51)                  2.209(14)
            C(52)-C(53)                   1.233(8)
            C(52)-Li(51)                  2.081(13)
            C(52)-Li(52)                  2.425(14)
            C(53)-C(54)                   1.454(8)
            C(53)-Li(52)                  2.092(13)
            C(53)-Li(51)                  2.393(13)
            C(54)-Si(53)                  1.819(7)
            C(54)-Si(54)                  1.835(7)
            C(54)-Li(52)                  2.212(13)
            C(55)-Si(51)                  1.885(9)
            C(55)-H(55A)                  0.9585
            C(55)-H(55B)                  0.9605
            C(55)-H(55C)                  0.9595
            C(56)-Si(51)                  1.874(10)
            C(56)-H(56A)                  0.9590
            C(56)-H(56B)                  0.9596
            C(56)-H(56C)                  0.9599
            C(57)-Si(51)                  1.909(10)
            C(57)-H(57A)                  0.9594
            C(57)-H(57B)                  0.9596
            C(57)-H(57C)                  0.9591
            C(58)-Si(52)                  1.904(8)
            C(58)-H(58A)                  0.9597
            C(58)-H(58B)                  0.9588
            C(58)-H(58C)                  0.9592
            C(59)-Si(52)                  1.870(11)
            C(59)-H(59A)                  0.9599
            C(59)-H(59B)                  0.9595
            C(59)-H(59C)                  0.9597
            C(60)-Si(52)                  1.894(9)
            C(60)-H(60A)                  0.9607
            C(60)-H(60B)                  0.9601
            C(60)-H(60C)                  0.9594
            C(61)-Si(53)                  1.873(10)
            C(61)-H(61A)                  0.9597
            C(61)-H(61B)                  0.9592
            C(61)-H(61C)                  0.9595
            C(62)-Si(53)                  1.872(10)
            C(62)-H(62A)                  0.9602
            C(62)-H(62B)                  0.9591
            C(62)-H(62C)                  0.9601
            C(63)-Si(53)                  1.876(9)
            C(63)-H(63A)                  0.9600
            C(63)-H(63B)                  0.9601
            C(63)-H(63C)                  0.9592
            C(64)-Si(54)                  1.856(9)
            C(64)-H(64A)                  0.9600
            C(64)-H(64B)                  0.9594
            C(64)-H(64C)                  0.9594
            C(65)-Si(54)                  1.867(10)
            C(65)-H(65A)                  0.9599
            C(65)-H(65B)                  0.9601
            C(65)-H(65C)                  0.9602
            C(66)-Si(54)                  1.888(10)
            C(66)-H(66A)                  0.9601
            C(66)-H(66B)                  0.9602
            C(66)-H(66C)                  0.9587
            C(67)-C(68)                   1.36(2)
            C(67)-O(51)                   1.416(11)
            C(67)-H(67A)                  0.9610
            C(67)-H(67B)                  0.9597
            C(68)-C(69)                   1.39(3)
            C(68)-H(68A)                  0.9586
            C(68)-H(68B)                  0.9614
            C(69)-C(70)                   1.51(3)
            C(69)-H(69A)                  0.9600
            C(69)-H(69B)                  0.9611
            C(70)-O(51)                   1.418(11)
            C(70)-H(70A)                  0.9606
            C(70)-H(70B)                  0.9604
            C(71)-C(72)                   1.428(13)
            C(71)-O(52)                   1.440(10)
            C(71)-H(71A)                  0.9610
            C(71)-H(71B)                  0.9603
            C(72)-C(73)                   1.348(15)
            C(72)-H(72A)                  0.9597
            C(72)-H(72B)                  0.9608
            C(73)-C(74)                   1.423(13)
            C(73)-H(73A)                  0.9602
            C(73)-H(73B)                  1.0830
            C(74)-O(52)                   1.436(9)
            C(74)-H(74A)                  0.9601
            C(74)-H(74B)                  0.9591
            C(75)-O(53)                   1.437(10)
            C(75)-C(76)                   1.487(16)
            C(75)-H(75A)                  0.9609
            C(75)-H(75B)                  0.9608
            C(76)-C(77)                   1.459(16)
            C(76)-H(76A)                  0.9586
            C(76)-H(76B)                  0.9606
            C(77)-C(78)                   1.461(13)
            C(77)-H(77A)                  0.9593
            C(77)-H(77B)                  0.9604
            C(78)-O(53)                   1.411(10)
            C(78)-H(78A)                  0.9593
            C(78)-H(78B)                  0.9604
            C(79)-O(54)                   1.414(10)
            C(79)-C(80)                   1.445(14)
            C(79)-H(79A)                  0.9587
            C(79)-H(79B)                  0.9599
            C(80)-C(81)                   1.477(16)
            C(80)-H(80A)                  0.9595
            C(80)-H(80B)                  0.9601
            C(81)-C(82)                   1.480(13)
            C(81)-H(81A)                  0.9599
            C(81)-H(81B)                  0.9606
            C(82)-O(54)                   1.434(9)
            C(82)-H(82A)                  0.9600
            C(82)-H(82B)                  0.9608
            Li(1)-O(1)                    1.948(12)
            Li(1)-O(2)                    1.963(12)
            Li(2)-O(4)                    1.947(13)
            Li(2)-O(3)                    1.947(13)
            Li(51)-O(52)                  1.938(13)
            Li(51)-O(51)                  1.947(13)
            Li(52)-O(54)                  1.925(13)
            Li(52)-O(53)                  1.979(12)

            C(2)-C(1)-Si(2)             119.8(5)
            C(2)-C(1)-Si(1)             114.6(5)
            Si(2)-C(1)-Si(1)            119.4(4)
            C(2)-C(1)-Li(1)              66.8(5)
            Si(2)-C(1)-Li(1)            106.7(4)
            Si(1)-C(1)-Li(1)            117.9(4)
            C(3)-C(2)-C(1)              163.9(7)
            C(3)-C(2)-Li(1)              89.6(6)
            C(1)-C(2)-Li(1)              74.5(5)
            C(3)-C(2)-Li(2)              59.5(4)
            C(1)-C(2)-Li(2)             135.9(5)
            Li(1)-C(2)-Li(2)            141.2(5)
            C(2)-C(3)-C(4)              164.3(6)
            C(2)-C(3)-Li(2)              89.7(5)
            C(4)-C(3)-Li(2)              74.7(5)
            C(2)-C(3)-Li(1)              59.9(5)
            C(4)-C(3)-Li(1)             134.7(5)
            Li(2)-C(3)-Li(1)            141.5(5)
            C(3)-C(4)-Si(3)             121.6(5)
            C(3)-C(4)-Si(4)             112.9(5)
            Si(3)-C(4)-Si(4)            120.9(4)
            C(3)-C(4)-Li(2)              66.1(5)
            Si(3)-C(4)-Li(2)            106.3(5)
            Si(4)-C(4)-Li(2)            115.5(5)
            Si(1)-C(5)-H(5A)            108.4
            Si(1)-C(5)-H(5B)            109.1
            H(5A)-C(5)-H(5B)            109.5
            Si(1)-C(5)-H(5C)            111.0
            H(5A)-C(5)-H(5C)            109.5
            H(5B)-C(5)-H(5C)            109.4
            Si(1)-C(6)-H(6A)            109.3
            Si(1)-C(6)-H(6B)            109.7
            H(6A)-C(6)-H(6B)            109.6
            Si(1)-C(6)-H(6C)            109.5
            H(6A)-C(6)-H(6C)            109.4
            H(6B)-C(6)-H(6C)            109.4
            Si(1)-C(7)-H(7A)            109.9
            Si(1)-C(7)-H(7B)            109.5
            H(7A)-C(7)-H(7B)            109.4
            Si(1)-C(7)-H(7C)            109.0
            H(7A)-C(7)-H(7C)            109.5
            H(7B)-C(7)-H(7C)            109.5
            Si(2)-C(8)-H(8A)            109.9
            Si(2)-C(8)-H(8B)            108.1
            H(8A)-C(8)-H(8B)            109.4
            Si(2)-C(8)-H(8C)            110.4
            H(8A)-C(8)-H(8C)            109.5
            H(8B)-C(8)-H(8C)            109.5
            Si(2)-C(9)-H(9A)            107.6
            Si(2)-C(9)-H(9B)            110.4
            H(9A)-C(9)-H(9B)            109.5
            Si(2)-C(9)-H(9C)            110.4
            H(9A)-C(9)-H(9C)            109.5
            H(9B)-C(9)-H(9C)            109.4
            Si(2)-C(10)-H(10A)          107.1
            Si(2)-C(10)-H(10B)          111.0
            H(10A)-C(10)-H(10B)         109.4
            Si(2)-C(10)-H(10C)          110.2
            H(10A)-C(10)-H(10C)         109.6
            H(10B)-C(10)-H(10C)         109.4
            Si(3)-C(11)-H(11A)          110.1
            Si(3)-C(11)-H(11B)          109.0
            H(11A)-C(11)-H(11B)         109.5
            Si(3)-C(11)-H(11C)          109.2
            H(11A)-C(11)-H(11C)         109.4
            H(11B)-C(11)-H(11C)         109.6
            Si(3)-C(12)-H(12A)          112.4
            Si(3)-C(12)-H(12B)          107.8
            H(12A)-C(12)-H(12B)         109.5
            Si(3)-C(12)-H(12C)          108.1
            H(12A)-C(12)-H(12C)         109.6
            H(12B)-C(12)-H(12C)         109.4
            Si(3)-C(13)-H(13A)          109.5
            Si(3)-C(13)-H(13B)          109.9
            H(13A)-C(13)-H(13B)         109.4
            Si(3)-C(13)-H(13C)          109.0
            H(13A)-C(13)-H(13C)         109.5
            H(13B)-C(13)-H(13C)         109.5
            Si(4)-C(14)-H(14A)          110.3
            Si(4)-C(14)-H(14B)          109.0
            H(14A)-C(14)-H(14B)         109.4
            Si(4)-C(14)-H(14C)          109.2
            H(14A)-C(14)-H(14C)         109.5
            H(14B)-C(14)-H(14C)         109.4
            Si(4)-C(15)-H(15A)          109.3
            Si(4)-C(15)-H(15B)          108.7
            H(15A)-C(15)-H(15B)         109.5
            Si(4)-C(15)-H(15C)          110.5
            H(15A)-C(15)-H(15C)         109.5
            H(15B)-C(15)-H(15C)         109.4
            Si(4)-C(16)-H(16A)          109.8
            Si(4)-C(16)-H(16B)          111.5
            H(16A)-C(16)-H(16B)         109.4
            Si(4)-C(16)-H(16C)          107.0
            H(16A)-C(16)-H(16C)         109.5
            H(16B)-C(16)-H(16C)         109.6
            O(1)-C(17)-C(18)            105.3(8)
            O(1)-C(17)-H(17A)           105.6
            C(18)-C(17)-H(17A)          113.9
            O(1)-C(17)-H(17B)           113.6
            C(18)-C(17)-H(17B)          109.2
            H(17A)-C(17)-H(17B)         109.4
            C(19)-C(18)-C(17)           104.3(10)
            C(19)-C(18)-H(18A)          113.0
            C(17)-C(18)-H(18A)          116.3
            C(19)-C(18)-H(18B)          101.5
            C(17)-C(18)-H(18B)          111.1
            H(18A)-C(18)-H(18B)         109.5
            C(20)-C(19)-C(18)           108.7(10)
            C(20)-C(19)-H(19A)          110.2
            C(18)-C(19)-H(19A)          102.4
            C(20)-C(19)-H(19B)          110.6
            C(18)-C(19)-H(19B)          115.1
            H(19A)-C(19)-H(19B)         109.5
            O(1)-C(20)-C(19)            107.4(9)
            O(1)-C(20)-H(20A)           108.6
            C(19)-C(20)-H(20A)          112.1
            O(1)-C(20)-H(20B)           107.7
            C(19)-C(20)-H(20B)          111.3
            H(20A)-C(20)-H(20B)         109.6
            O(2)-C(21)-C(22)            106.1(8)
            O(2)-C(21)-H(21A)           108.1
            C(22)-C(21)-H(21A)          113.6
            O(2)-C(21)-H(21B)           108.7
            C(22)-C(21)-H(21B)          110.6
            H(21A)-C(21)-H(21B)         109.5
            C(21)-C(22)-C(23)           105.2(9)
            C(21)-C(22)-H(22A)          112.0
            C(23)-C(22)-H(22A)          111.6
            C(21)-C(22)-H(22B)          109.4
            C(23)-C(22)-H(22B)          108.9
            H(22A)-C(22)-H(22B)         109.5
            C(22)-C(23)-C(24)           106.7(8)
            C(22)-C(23)-H(23A)          109.5
            C(24)-C(23)-H(23A)          109.6
            C(22)-C(23)-H(23B)          112.3
            C(24)-C(23)-H(23B)          109.3
            H(23A)-C(23)-H(23B)         109.5
            O(2)-C(24)-C(23)            106.0(8)
            O(2)-C(24)-H(24A)           107.5
            C(23)-C(24)-H(24A)          112.7
            O(2)-C(24)-H(24B)           107.7
            C(23)-C(24)-H(24B)          113.1
            H(24A)-C(24)-H(24B)         109.5
            O(3)-C(25)-C(26)            107.6(11)
            O(3)-C(25)-H(25A)           103.9
            C(26)-C(25)-H(25A)          105.1
            O(3)-C(25)-H(25B)           114.8
            C(26)-C(25)-H(25B)          115.0
            H(25A)-C(25)-H(25B)         109.4
            C(25)-C(26)-C(27)           105.4(12)
            C(25)-C(26)-H(26A)          106.6
            C(27)-C(26)-H(26A)          109.9
            C(25)-C(26)-H(26B)          116.4
            C(27)-C(26)-H(26B)          108.9
            H(26A)-C(26)-H(26B)         109.5
            C(28)-C(27)-C(26)           105.2(11)
            C(28)-C(27)-H(27A)          111.2
            C(26)-C(27)-H(27A)          111.3
            C(28)-C(27)-H(27B)          107.2
            C(26)-C(27)-H(27B)          112.4
            H(27A)-C(27)-H(27B)         109.4
            O(3)-C(28)-C(27)            108.0(13)
            O(3)-C(28)-H(28A)           106.6
            C(27)-C(28)-H(28A)          109.2
            O(3)-C(28)-H(28B)           110.1
            C(27)-C(28)-H(28B)          113.3
            H(28A)-C(28)-H(28B)         109.4
            C(30)-C(29)-O(4)            105.4(8)
            C(30)-C(29)-H(29A)          114.9
            O(4)-C(29)-H(29A)           110.4
            C(30)-C(29)-H(29B)          106.7
            O(4)-C(29)-H(29B)           109.8
            H(29A)-C(29)-H(29B)         109.5
            C(29)-C(30)-C(31)           104.5(9)
            C(29)-C(30)-H(30A)          116.1
            C(31)-C(30)-H(30A)          114.0
            C(29)-C(30)-H(30B)          108.5
            C(31)-C(30)-H(30B)          103.3
            H(30A)-C(30)-H(30B)         109.5
            C(32)-C(31)-C(30)           106.9(8)
            C(32)-C(31)-H(31A)          107.5
            C(30)-C(31)-H(31A)          104.7
            C(32)-C(31)-H(31B)          113.0
            C(30)-C(31)-H(31B)          114.6
            H(31A)-C(31)-H(31B)         109.5
            C(31)-C(32)-O(4)            105.5(8)
            C(31)-C(32)-H(32A)          114.2
            O(4)-C(32)-H(32A)           108.6
            C(31)-C(32)-H(32B)          110.4
            O(4)-C(32)-H(32B)           108.4
            H(32A)-C(32)-H(32B)         109.6
            C(52)-C(51)-Si(52)          116.5(5)
            C(52)-C(51)-Si(51)          118.7(5)
            Si(52)-C(51)-Si(51)         120.1(4)
            C(52)-C(51)-Li(51)           65.6(5)
            Si(52)-C(51)-Li(51)         116.3(5)
            Si(51)-C(51)-Li(51)         106.1(5)
            C(53)-C(52)-C(51)           163.9(6)
            C(53)-C(52)-Li(51)           88.6(6)
            C(51)-C(52)-Li(51)           75.3(5)
            C(53)-C(52)-Li(52)           59.6(5)
            C(51)-C(52)-Li(52)          134.9(5)
            Li(51)-C(52)-Li(52)         139.2(6)
            C(52)-C(53)-C(54)           164.6(6)
            C(52)-C(53)-Li(52)           89.9(5)
            C(54)-C(53)-Li(52)           74.8(5)
            C(52)-C(53)-Li(51)           60.4(5)
            C(54)-C(53)-Li(51)          133.4(5)
            Li(52)-C(53)-Li(51)         140.7(6)
            C(53)-C(54)-Si(53)          113.8(5)
            C(53)-C(54)-Si(54)          119.3(5)
            Si(53)-C(54)-Si(54)         120.9(3)
            C(53)-C(54)-Li(52)           65.9(5)
            Si(53)-C(54)-Li(52)         117.3(5)
            Si(54)-C(54)-Li(52)         106.8(4)
            Si(51)-C(55)-H(55A)         109.5
            Si(51)-C(55)-H(55B)         109.1
            H(55A)-C(55)-H(55B)         109.5
            Si(51)-C(55)-H(55C)         109.9
            H(55A)-C(55)-H(55C)         109.5
            H(55B)-C(55)-H(55C)         109.4
            Si(51)-C(56)-H(56A)         105.8
            Si(51)-C(56)-H(56B)         111.3
            H(56A)-C(56)-H(56B)         109.5
            Si(51)-C(56)-H(56C)         111.3
            H(56A)-C(56)-H(56C)         109.5
            H(56B)-C(56)-H(56C)         109.4
            Si(51)-C(57)-H(57A)         108.8
            Si(51)-C(57)-H(57B)         108.4
            H(57A)-C(57)-H(57B)         109.5
            Si(51)-C(57)-H(57C)         111.1
            H(57A)-C(57)-H(57C)         109.5
            H(57B)-C(57)-H(57C)         109.5
            Si(52)-C(58)-H(58A)         110.4
            Si(52)-C(58)-H(58B)         110.5
            H(58A)-C(58)-H(58B)         109.5
            Si(52)-C(58)-H(58C)         107.4
            H(58A)-C(58)-H(58C)         109.5
            H(58B)-C(58)-H(58C)         109.5
            Si(52)-C(59)-H(59A)         110.4
            Si(52)-C(59)-H(59B)         110.2
            H(59A)-C(59)-H(59B)         109.4
            Si(52)-C(59)-H(59C)         107.8
            H(59A)-C(59)-H(59C)         109.6
            H(59B)-C(59)-H(59C)         109.5
            Si(52)-C(60)-H(60A)         108.9
            Si(52)-C(60)-H(60B)         110.0
            H(60A)-C(60)-H(60B)         109.5
            Si(52)-C(60)-H(60C)         109.5
            H(60A)-C(60)-H(60C)         109.5
            H(60B)-C(60)-H(60C)         109.4
            Si(53)-C(61)-H(61A)         109.4
            Si(53)-C(61)-H(61B)         109.4
            H(61A)-C(61)-H(61B)         109.5
            Si(53)-C(61)-H(61C)         109.6
            H(61A)-C(61)-H(61C)         109.4
            H(61B)-C(61)-H(61C)         109.5
            Si(53)-C(62)-H(62A)         109.0
            Si(53)-C(62)-H(62B)         109.8
            H(62A)-C(62)-H(62B)         109.5
            Si(53)-C(62)-H(62C)         109.6
            H(62A)-C(62)-H(62C)         109.4
            H(62B)-C(62)-H(62C)         109.5
            Si(53)-C(63)-H(63A)         108.8
            Si(53)-C(63)-H(63B)         109.2
            H(63A)-C(63)-H(63B)         109.5
            Si(53)-C(63)-H(63C)         110.3
            H(63A)-C(63)-H(63C)         109.5
            H(63B)-C(63)-H(63C)         109.5
            Si(54)-C(64)-H(64A)         109.2
            Si(54)-C(64)-H(64B)         110.5
            H(64A)-C(64)-H(64B)         109.6
            Si(54)-C(64)-H(64C)         108.5
            H(64A)-C(64)-H(64C)         109.5
            H(64B)-C(64)-H(64C)         109.5
            Si(54)-C(65)-H(65A)         108.0
            Si(54)-C(65)-H(65B)         108.6
            H(65A)-C(65)-H(65B)         109.6
            Si(54)-C(65)-H(65C)         111.8
            H(65A)-C(65)-H(65C)         109.5
            H(65B)-C(65)-H(65C)         109.3
            Si(54)-C(66)-H(66A)         108.7
            Si(54)-C(66)-H(66B)         108.4
            H(66A)-C(66)-H(66B)         109.5
            Si(54)-C(66)-H(66C)         111.3
            H(66A)-C(66)-H(66C)         109.4
            H(66B)-C(66)-H(66C)         109.5
            C(68)-C(67)-O(51)           106.9(13)
            C(68)-C(67)-H(67A)          107.1
            O(51)-C(67)-H(67A)          104.0
            C(68)-C(67)-H(67B)          115.8
            O(51)-C(67)-H(67B)          112.8
            H(67A)-C(67)-H(67B)         109.4
            C(67)-C(68)-C(69)           110.4(13)
            C(67)-C(68)-H(68A)          104.7
            C(69)-C(68)-H(68A)          109.0
            C(67)-C(68)-H(68B)          114.0
            C(69)-C(68)-H(68B)          109.1
            H(68A)-C(68)-H(68B)         109.5
            C(68)-C(69)-C(70)           106.7(13)
            C(68)-C(69)-H(69A)          113.0
            C(70)-C(69)-H(69A)          108.0
            C(68)-C(69)-H(69B)          112.8
            C(70)-C(69)-H(69B)          106.4
            H(69A)-C(69)-H(69B)         109.5
            O(51)-C(70)-C(69)           101.7(14)
            O(51)-C(70)-H(70A)          108.5
            C(69)-C(70)-H(70A)          113.4
            O(51)-C(70)-H(70B)          110.5
            C(69)-C(70)-H(70B)          112.8
            H(70A)-C(70)-H(70B)         109.5
            C(72)-C(71)-O(52)           106.4(8)
            C(72)-C(71)-H(71A)          111.1
            O(52)-C(71)-H(71A)          108.2
            C(72)-C(71)-H(71B)          112.8
            O(52)-C(71)-H(71B)          108.8
            H(71A)-C(71)-H(71B)         109.4
            C(73)-C(72)-C(71)           107.9(9)
            C(73)-C(72)-H(72A)          107.6
            C(71)-C(72)-H(72A)          109.7
            C(73)-C(72)-H(72B)          110.4
            C(71)-C(72)-H(72B)          111.6
            H(72A)-C(72)-H(72B)         109.5
            C(72)-C(73)-C(74)           111.4(10)
            C(72)-C(73)-H(73A)          107.3
            C(74)-C(73)-H(73A)          108.1
            C(72)-C(73)-H(73B)          132.5
            C(74)-C(73)-H(73B)          115.1
            H(73A)-C(73)-H(73B)          49.1
            C(73)-C(74)-O(52)           105.0(8)
            C(73)-C(74)-H(74A)          110.9
            O(52)-C(74)-H(74A)          108.0
            C(73)-C(74)-H(74B)          114.1
            O(52)-C(74)-H(74B)          109.0
            H(74A)-C(74)-H(74B)         109.5
            O(53)-C(75)-C(76)           105.3(9)
            O(53)-C(75)-H(75A)          108.6
            C(76)-C(75)-H(75A)          109.2
            O(53)-C(75)-H(75B)          112.0
            C(76)-C(75)-H(75B)          112.1
            H(75A)-C(75)-H(75B)         109.5
            C(77)-C(76)-C(75)           105.4(8)
            C(77)-C(76)-H(76A)          111.4
            C(75)-C(76)-H(76A)          111.1
            C(77)-C(76)-H(76B)          105.3
            C(75)-C(76)-H(76B)          113.9
            H(76A)-C(76)-H(76B)         109.5
            C(78)-C(77)-C(76)           106.6(9)
            C(78)-C(77)-H(77A)          112.1
            C(76)-C(77)-H(77A)          106.3
            C(78)-C(77)-H(77B)          109.4
            C(76)-C(77)-H(77B)          113.0
            H(77A)-C(77)-H(77B)         109.5
            O(53)-C(78)-C(77)           108.4(8)
            O(53)-C(78)-H(78A)          104.6
            C(77)-C(78)-H(78A)          109.8
            O(53)-C(78)-H(78B)          112.0
            C(77)-C(78)-H(78B)          112.2
            H(78A)-C(78)-H(78B)         109.5
            O(54)-C(79)-C(80)           109.1(10)
            O(54)-C(79)-H(79A)          111.9
            C(80)-C(79)-H(79A)          111.4
            O(54)-C(79)-H(79B)          107.8
            C(80)-C(79)-H(79B)          107.0
            H(79A)-C(79)-H(79B)         109.4
            C(79)-C(80)-C(81)           105.8(9)
            C(79)-C(80)-H(80A)          114.0
            C(81)-C(80)-H(80A)          109.8
            C(79)-C(80)-H(80B)          109.4
            C(81)-C(80)-H(80B)          108.2
            H(80A)-C(80)-H(80B)         109.6
            C(80)-C(81)-C(82)           106.6(9)
            C(80)-C(81)-H(81A)          109.4
            C(82)-C(81)-H(81A)          109.2
            C(80)-C(81)-H(81B)          111.4
            C(82)-C(81)-H(81B)          110.6
            H(81A)-C(81)-H(81B)         109.5
            O(54)-C(82)-C(81)           105.2(8)
            O(54)-C(82)-H(82A)          109.1
            C(81)-C(82)-H(82A)          112.2
            O(54)-C(82)-H(82B)          109.4
            C(81)-C(82)-H(82B)          111.4
            H(82A)-C(82)-H(82B)         109.4
            O(1)-Li(1)-O(2)              99.8(6)
            O(1)-Li(1)-C(2)             138.8(6)
            O(2)-Li(1)-C(2)             119.9(6)
            O(1)-Li(1)-C(1)             122.8(6)
            O(2)-Li(1)-C(1)             127.5(6)
            C(2)-Li(1)-C(1)              38.7(3)
            O(1)-Li(1)-C(3)             134.5(6)
            O(2)-Li(1)-C(3)             103.4(5)
            C(2)-Li(1)-C(3)              30.5(3)
            C(1)-Li(1)-C(3)              69.2(4)
            O(4)-Li(2)-O(3)              99.3(6)
            O(4)-Li(2)-C(3)             137.5(7)
            O(3)-Li(2)-C(3)             120.8(7)
            O(4)-Li(2)-C(4)             122.8(6)
            O(3)-Li(2)-C(4)             129.2(7)
            C(3)-Li(2)-C(4)              39.2(3)
            O(4)-Li(2)-C(2)             131.7(7)
            O(3)-Li(2)-C(2)             103.9(6)
            C(3)-Li(2)-C(2)              30.8(3)
            C(4)-Li(2)-C(2)              70.0(4)
            O(52)-Li(51)-O(51)          100.4(6)
            O(52)-Li(51)-C(52)          137.8(7)
            O(51)-Li(51)-C(52)          120.2(6)
            O(52)-Li(51)-C(51)          121.7(7)
            O(51)-Li(51)-C(51)          128.1(7)
            C(52)-Li(51)-C(51)           39.0(3)
            O(52)-Li(51)-C(53)          133.0(7)
            O(51)-Li(51)-C(53)          103.8(6)
            C(52)-Li(51)-C(53)           31.0(3)
            C(51)-Li(51)-C(53)           70.0(4)
            O(54)-Li(52)-O(53)           98.8(6)
            O(54)-Li(52)-C(53)          121.2(6)
            O(53)-Li(52)-C(53)          138.5(7)
            O(54)-Li(52)-C(54)          128.8(6)
            O(53)-Li(52)-C(54)          121.6(6)
            C(53)-Li(52)-C(54)           39.4(3)
            O(54)-Li(52)-C(52)          105.1(6)
            O(53)-Li(52)-C(52)          133.9(6)
            C(53)-Li(52)-C(52)           30.6(3)
            C(54)-Li(52)-C(52)           69.9(4)
            C(17)-O(1)-C(20)            107.5(7)
            C(17)-O(1)-Li(1)            128.2(7)
            C(20)-O(1)-Li(1)            121.1(7)
            C(24)-O(2)-C(21)            107.5(6)
            C(24)-O(2)-Li(1)            126.2(6)
            C(21)-O(2)-Li(1)            125.6(6)
            C(28)-O(3)-C(25)            107.7(8)
            C(28)-O(3)-Li(2)            125.3(7)
            C(25)-O(3)-Li(2)            127.0(7)
            C(32)-O(4)-C(29)            108.5(6)
            C(32)-O(4)-Li(2)            127.8(6)
            C(29)-O(4)-Li(2)            122.5(6)
            C(67)-O(51)-C(70)           108.6(9)
            C(67)-O(51)-Li(51)          127.7(7)
            C(70)-O(51)-Li(51)          123.7(9)
            C(74)-O(52)-C(71)           107.8(6)
            C(74)-O(52)-Li(51)          121.6(6)
            C(71)-O(52)-Li(51)          129.1(7)
            C(78)-O(53)-C(75)           107.4(7)
            C(78)-O(53)-Li(52)          127.7(7)
            C(75)-O(53)-Li(52)          123.3(6)
            C(79)-O(54)-C(82)           108.0(7)
            C(79)-O(54)-Li(52)          126.9(7)
            C(82)-O(54)-Li(52)          124.9(6)
            C(1)-Si(1)-C(5)             112.2(4)
            C(1)-Si(1)-C(6)             111.1(4)
            C(5)-Si(1)-C(6)             107.1(4)
            C(1)-Si(1)-C(7)             115.1(4)
            C(5)-Si(1)-C(7)             104.4(4)
            C(6)-Si(1)-C(7)             106.5(4)
            C(1)-Si(2)-C(9)             111.9(4)
            C(1)-Si(2)-C(8)             114.1(4)
            C(9)-Si(2)-C(8)             107.2(5)
            C(1)-Si(2)-C(10)            114.2(4)
            C(9)-Si(2)-C(10)            105.4(6)
            C(8)-Si(2)-C(10)            103.3(6)
            C(4)-Si(3)-C(11)            113.2(4)
            C(4)-Si(3)-C(12)            111.4(3)
            C(11)-Si(3)-C(12)           108.1(5)
            C(4)-Si(3)-C(13)            115.5(4)
            C(11)-Si(3)-C(13)           103.0(5)
            C(12)-Si(3)-C(13)           104.8(5)
            C(4)-Si(4)-C(15)            112.6(4)
            C(4)-Si(4)-C(14)            112.1(4)
            C(15)-Si(4)-C(14)           108.6(4)
            C(4)-Si(4)-C(16)            113.9(4)
            C(15)-Si(4)-C(16)           104.3(4)
            C(14)-Si(4)-C(16)           104.7(5)
            C(51)-Si(51)-C(56)          111.6(4)
            C(51)-Si(51)-C(55)          112.6(4)
            C(56)-Si(51)-C(55)          107.5(5)
            C(51)-Si(51)-C(57)          112.6(4)
            C(56)-Si(51)-C(57)          107.6(5)
            C(55)-Si(51)-C(57)          104.6(5)
            C(51)-Si(52)-C(59)          111.2(4)
            C(51)-Si(52)-C(60)          112.7(4)
            C(59)-Si(52)-C(60)          107.7(5)
            C(51)-Si(52)-C(58)          115.0(4)
            C(59)-Si(52)-C(58)          104.6(4)
            C(60)-Si(52)-C(58)          105.0(4)
            C(54)-Si(53)-C(61)          114.1(4)
            C(54)-Si(53)-C(62)          112.1(3)
            C(61)-Si(53)-C(62)          105.3(5)
            C(54)-Si(53)-C(63)          112.9(4)
            C(61)-Si(53)-C(63)          105.1(5)
            C(62)-Si(53)-C(63)          106.7(5)
            C(54)-Si(54)-C(64)          112.0(3)
            C(54)-Si(54)-C(65)          114.2(4)
            C(64)-Si(54)-C(65)          106.1(5)
            C(54)-Si(54)-C(66)          114.3(4)
            C(64)-Si(54)-C(66)          106.1(5)
            C(65)-Si(54)-C(66)          103.2(6)
           _____________________________________________________________

           Symmetry transformations used to generate equivalent atoms:

    Table 4.  Anisotropic displacement parameters (A^2 x 10^3) for monomer.
    The anisotropic displacement factor exponent takes the form:
    -2 pi^2 [ h^2 a*^2 U11 + ... + 2 h k a* b* U12 ]

    _______________________________________________________________________

              U11        U22        U33        U23        U13        U12
    _______________________________________________________________________

    C(1)     49(3)      40(3)      41(3)       1(3)      -5(3)      -4(3)
    C(2)     36(3)      48(3)      32(3)      -7(3)       1(3)      -2(2)
    C(3)     33(3)      39(3)      37(3)       1(2)       1(2)      -1(2)
    C(4)     36(3)      43(3)      44(4)       2(3)      -8(3)       0(3)
    C(5)     58(5)      76(6)      61(5)     -10(4)       4(4)      -6(4)
    C(6)     57(5)      84(6)      76(6)     -11(5)      -2(4)     -24(4)
    C(7)     63(5)      70(6)      84(6)      -9(5)     -27(5)       2(4)
    C(8)    129(9)      41(4)      80(7)      -9(4)      10(7)       2(5)
    C(9)     95(7)      56(5)     100(8)     -22(5)      47(6)      -6(5)
    C(10)   131(10)    121(9)      54(6)     -34(6)     -21(6)      22(8)
    C(11)    91(7)      54(5)     100(8)       3(5)      35(6)      -8(4)
    C(12)    63(5)      75(6)      57(5)       3(4)      16(4)     -14(4)
    C(13)    50(5)      84(7)     114(8)     -17(6)       7(5)     -22(4)
    C(14)    63(6)     118(8)      37(4)     -17(4)       8(4)     -16(5)
    C(15)    74(6)      83(6)      66(6)     -23(5)     -18(5)      -7(5)
    C(16)    92(7)      91(7)      56(5)       0(5)     -27(5)     -13(5)
    C(17)   196(14)     91(8)      41(5)       9(5)     -22(6)     -54(8)
    C(18)   330(30)    114(11)     71(8)      36(7)     -80(12)    -54(13)
    C(19)    86(8)      78(7)     122(10)      4(7)       0(7)      -9(5)
    C(20)    88(7)     115(9)     109(9)      47(7)     -11(7)     -52(7)
    C(21)    53(5)      57(5)     128(9)       1(5)      19(5)      -5(4)
    C(22)    62(6)     139(11)    104(9)      35(8)      -8(6)      -6(6)
    C(23)    75(7)     101(9)     124(10)    -13(8)     -31(7)      35(6)
    C(24)    66(5)      56(5)     129(9)      17(6)      13(6)      18(4)
    C(25)   118(9)      90(7)      56(6)     -28(5)     -22(6)      16(6)
    C(26)   118(11)    290(20)     46(6)      31(10)      4(6)      84(13)
    C(27)   145(15)    220(20)    161(17)    119(16)     17(12)     -7(14)
    C(28)   195(14)     75(7)     100(9)      34(7)     -74(10)      0(8)
    C(29)    77(6)      75(6)     104(8)     -40(6)      -8(6)      20(5)
    C(30)    63(6)     129(10)    111(8)     -65(8)      -2(6)      21(6)
    C(31)    85(8)     184(14)    119(10)    -91(10)    -30(7)      72(8)
    C(32)    68(5)      90(7)      76(6)     -24(5)     -11(5)      20(5)
    C(51)    42(4)      34(3)      48(4)       0(3)       1(3)       2(2)
    C(52)    35(3)      38(3)      32(3)      -2(2)       0(2)       3(2)
    C(53)    34(3)      40(3)      38(3)      -5(3)      -1(3)       3(2)
    C(54)    42(3)      39(3)      42(3)      -2(3)       6(3)      -6(2)
    C(55)   123(9)      42(5)     119(9)      -1(5)     -45(7)     -12(5)
    C(56)    66(6)      73(6)      68(6)      -3(4)     -24(5)      -1(4)
    C(57)    49(4)      90(7)     117(9)      26(6)     -23(5)     -19(4)
    C(58)    60(5)      92(7)      69(6)     -13(5)      29(4)      -1(5)
    C(59)    69(5)      87(6)      42(5)      -4(4)       4(4)       1(4)
    C(60)    85(6)      73(6)      82(6)      23(5)      17(5)       3(5)
    C(61)    63(5)      77(6)      86(7)      23(5)      16(5)       2(4)
    C(62)    45(4)     119(8)      71(6)       4(6)     -17(4)     -18(5)
    C(63)    60(5)      89(7)     112(8)     -14(6)       2(6)     -22(5)
    C(64)    87(6)      66(5)      68(5)      20(4)     -27(5)      -2(5)
    C(65)   106(8)      54(5)     106(9)       0(5)     -22(7)      -4(5)
    C(66)   113(9)     109(9)      71(7)      46(6)      18(6)      18(7)
    C(67)   166(14)    100(8)      47(6)      20(5)      -4(7)     -17(8)
    C(68)   310(30)    390(30)     36(6)      20(12)      4(10)    250(30)
    C(69)   123(13)    310(30)    200(20)   -180(20)    -36(13)    -16(15)
    C(70)   161(12)     84(8)     147(13)    -66(8)      57(11)    -14(8)
    C(71)    53(5)     105(8)     133(10)     55(7)      27(6)      23(5)
    C(72)    52(5)     153(12)    179(14)     99(11)     17(7)      18(6)
    C(73)    57(6)      96(9)     340(30)    104(13)    -40(10)     -3(6)
    C(74)    57(5)      58(5)      80(6)      14(4)       3(4)       0(4)
    C(75)   111(8)      99(8)      73(6)     -10(6)      -1(6)     -60(7)
    C(76)   125(10)     57(6)     100(8)     -12(6)     -51(8)       7(6)
    C(77)   125(10)    104(9)      77(7)     -38(7)      20(6)     -26(7)
    C(78)   222(15)     82(7)      63(6)     -23(5)      61(8)     -60(9)
    C(79)    83(7)      68(7)     206(15)    -39(8)     -17(8)      32(6)
    C(80)    71(6)      92(8)     137(11)     -1(8)      21(7)      19(6)
    C(81)    46(5)     162(12)     98(8)     -22(8)      13(5)      13(6)
    C(82)    42(4)      83(6)     101(7)      -7(5)     -17(5)      -1(4)
    Li(1)    42(6)      57(7)      42(6)       4(5)       8(5)      -3(5)
    Li(2)    47(6)      70(8)      38(6)      -2(6)      -7(5)       4(5)
    Li(51)   68(8)      44(6)      49(7)      -1(5)       3(6)      19(5)
    Li(52)   50(6)      58(7)      37(6)      -7(5)       3(5)       5(5)
    O(1)     57(3)      87(4)      47(3)       6(3)       3(2)     -20(3)
    O(2)     46(3)      44(3)      81(4)       7(3)      12(3)       4(2)
    O(3)     93(4)      52(3)      47(3)      -1(2)     -17(3)       8(3)
    O(4)     55(3)      71(4)      78(4)     -30(3)     -20(3)      23(3)
    O(51)   114(5)      50(3)      45(3)      -6(2)      21(3)      -2(3)
    O(52)    57(3)      60(3)      98(5)      27(3)      23(3)      21(3)
    O(53)    68(3)      63(3)      42(3)      -9(2)       5(2)     -20(3)
    O(54)    47(3)      48(3)      88(4)     -10(3)       2(3)       8(2)
    Si(1)    40(1)      62(1)      50(1)      -6(1)      -3(1)      -7(1)
    Si(2)    62(1)      49(1)      47(1)     -10(1)       4(1)      -3(1)
    Si(3)    46(1)      43(1)      60(1)       3(1)       4(1)      -5(1)
    Si(4)    49(1)      59(1)      43(1)      -7(1)      -9(1)      -5(1)
    Si(51)   50(1)      41(1)      72(1)       1(1)     -16(1)      -6(1)
    Si(52)   49(1)      55(1)      40(1)       4(1)       9(1)       1(1)
    Si(53)   40(1)      67(1)      60(1)       4(1)       2(1)      -9(1)
    Si(54)   59(1)      43(1)      51(1)       6(1)       2(1)      -2(1)
    _______________________________________________________________________

         Table 5.  Hydrogen coordinates ( x 10^4) and isotropic
         displacement parameters (A^2 x 10^3) for monomer.

         ________________________________________________________________

                         x             y             z           U(eq)
         ________________________________________________________________

          H(5A)        1760          2781          2589          80
          H(5B)        1299          3163          2385          80
          H(5C)        1688          4018          2339          80
          H(6A)        1622           641          1792          85
          H(6B)        1485           863          1152          85
          H(6C)        1172          1192          1656          85
          H(7A)        1512          4357          1070          88
          H(7B)        1101          3611          1190          88
          H(7C)        1414          3281           686          88
          H(8A)        2715            -4          1351          94
          H(8B)        2648          -292           698          94
          H(8C)        2248          -191          1108          94
          H(9A)        3227          2112           924          94
          H(9B)        3029          2883           438          94
          H(9C)        3146          1597           310          94
          H(10A)       1864          1472           294         115
          H(10B)       2254          1177          -108         115
          H(10C)       2138          2462            20         115
          H(11A)       3104          7697          1335          92
          H(11B)       3603          7797          1234          92
          H(11C)       3414          7888          1859          92
          H(12A)       3205          5304           645          75
          H(12B)       3563          4489           891          75
          H(12C)       3691          5681           628          75
          H(13A)       4017          6122          2262          88
          H(13B)       4210          6186          1640          88
          H(13C)       4082          4994          1903          88
          H(14A)       2240          5600          2916          83
          H(14B)       2461          5294          3503          83
          H(14C)       2399          4343          3033          83
          H(15A)       2957          7524          2837          85
          H(15B)       3441          7143          2891          85
          H(15C)       3134          7065          3426          85
          H(16A)       3331          3766          3107          92
          H(16B)       3366          4676          3602          92
          H(16C)       3673          4755          3067          92
          H(17A)       3059          1859          3339         124
          H(17B)       2640          2095          3697         124
          H(18A)       2700           250          4039         166
          H(18B)       2997           -77          3518         166
          H(19A)       2199          -349          3566         112
          H(19B)       2502          -854          3089         112
          H(20A)       1982           958          3000         116
          H(20B)       2246           363          2508         116
          H(21A)       3722          2485          1576          93
          H(21B)       3679          3184          2150          93
          H(22A)       4181          2204          2589         121
          H(22B)       4319          1843          1966         121
          H(23A)       3980           452          2738         109
          H(23B)       4100           102          2107         109
          H(24A)       3309           233          2479          99
          H(24B)       3428           229          1824          99
          H(25A)       2503          4578           375         101
          H(25B)       2007          4738           275         101
          H(26A)       2200          5463          -527         153
          H(26B)       2694          5474          -384         153
          H(27A)       2184          7303          -369         203
          H(27B)       2669          7297          -179         203
          H(28A)       1982          7252           511         136
          H(28B)       2455          7579           683         136
          H(29A)       2259          7490          2491         102
          H(29B)       2153          8244          1951         102
          H(30A)       1611          8831          2505         115
          H(30B)       1562          7580          2747         115
          H(31A)       1324          8221          1690         169
          H(31B)       1034          7531          2121         169
          H(32A)       1469          6561          1312          95
          H(32B)       1372          5929          1894          95
          H(55A)       5606         12439          5097         108
          H(55B)       5897         12695          4561         108
          H(55C)       6105         12585          5173         108
          H(56A)       5685         10101          5682          83
          H(56B)       6177         10354          5771          83
          H(56C)       6030          9196          5489          83
          H(57A)       6518         10940          4102         103
          H(57B)       6584          9778          4431         103
          H(57C)       6731         10936          4713         103
          H(58A)       5893          8659          3217          89
          H(58B)       6230          9658          3262          89
          H(58C)       5900          9633          2752          89
          H(59A)       4921          9234          3324          92
          H(59B)       5016         10116          2831          92
          H(59C)       4792         10528          3399          92
          H(60A)       5945         12088          3551          89
          H(60B)       5453         12404          3549          89
          H(60C)       5677         11992          2981          89
          H(61A)       4048          9206          5229          90
          H(61B)       3923          8128          5597          90
          H(61C)       3625          8524          5090          90
          H(62A)       4281          8878          3962          94
          H(62B)       3836          8246          3915          94
          H(62C)       4257          7643          3695          94
          H(63A)       3977          5752          5095          99
          H(63B)       4057          5607          4433          99
          H(63C)       3636          6210          4653          99
          H(64A)       5726          6811          5393          89
          H(64B)       5632          6284          6001          89
          H(64C)       5528          7579          5880          89
          H(65A)       5162          4801          4943          99
          H(65B)       4704          4635          5218          99
          H(65C)       5119          4439          5590          99
          H(66A)       4613          7274          6270         113
          H(66B)       4759          6023          6427         113
          H(66C)       4344          6219          6055         113
          H(67A)       4518          9632          6058         113
          H(67B)       5001          9264          5980         113
          H(68A)       5171         10310          6648         300
          H(68B)       4688         10299          6848         300
          H(69A)       5124         12059          6491         246
          H(69B)       4635         12038          6665         246
          H(70A)       4890         12370          5615         150
          H(70B)       4420         11987          5776         150
          H(71A)       3897         10640          4378         115
          H(71B)       3950         11378          4938         115
          H(72A)       3649         12746          4481         135
          H(72B)       3673         12078          3896         135
          H(73A)       4133         13165          3675         207
          H(73B)       4180         13804          3847         207
          H(74A)       4753         12872          4407          84
          H(74B)       4719         12268          3806          84
          H(75A)       4786          5054          3741         107
          H(75B)       4477          5712          3320         107
          H(76A)       4710          4398          2702         104
          H(76B)       5143          4183          3033         104
          H(77A)       5016          5654          2206         114
          H(77B)       5464          5241          2441         114
          H(78A)       5075          7203          2703         128
          H(78B)       5539          6830          2896         128
          H(79A)       5872          4881          4390         132
          H(79B)       5826          5121          3730         132
          H(80A)       6503          5098          3615         114
          H(80B)       6548          4847          4275         114
          H(81A)       6660          6865          3739         127
          H(81B)       6813          6533          4360         127
          H(82A)       6183          7931          4177          87
          H(82B)       6220          7221          4748          87
         ________________________________________________________________

====================================================
Tetrakis(trimethylsilyl)butatriene Dianion Dilithium (Dimer) (6)

      Table 1.  Crystal data and structure refinement for dimer.

Identification code				shelxl

Empirical formula					C40 H88 Li4 O2 Si8

Formula weight 					853.58

Temperature					120(2) K

Wavelength						0.71070

Crystal system, space group			Monoclinic, P21/c(#14)

Unit cell dimensions				a = 20.143(1) 
	� =
90.000(0)�
							b = 10.965(1)
	b = 149.546(2)�
							c = 24.689(1)
		g = 90.000(0)�

Volume						2763.8(2) 3

Z, Calculated density 				2,  1.026 g cm�3

Absorption coefficient				0.222 mm�1

F(000)						936

Crystal size						0.55 x 0.25 x 0.20 mm

Theta range for data collection		2.47 to 27.88�

Limiting indices					0 < = h < = 26,
0 < = k < = 14, �32 < = l < = 16

Reflections collected / unique    		6665 / 6369

Completeness to theta				27.88     96.6 %

Refinement method                			 Full-matrix
least-squares on F2

Data / restraints / parameters    		6369 / 0 / 245

Goodness-of-fit on F2            		1.025

Final R indices [I > 2sigma(I)]     		R1 = 0.0534, wR2 = 0.1432

R indices (all data)				R1 = 0.0633, wR2 = 0.1516

Extinction coefficient				0.021(2)

Largest diff. peak and hole			0.513 and �0.534 e �3

         Table 2.  Atomic coordinates ( x 10^4) and equivalent isotropic
         displacement parameters (A^2 x 10^3) for dimer.
         U(eq) is defined as one third of the trace of the orthogonalized
         Uij tensor.

         ________________________________________________________________

                         x             y             z           U(eq)
         ________________________________________________________________

          C(1)         5632(2)       1821(2)       6556(2)       24(1)
          C(2)         6307(2)       1323(2)       6572(1)       22(1)
          C(3)         6609(2)        787(2)       6357(1)       22(1)
          C(4)         7287(2)        407(2)       6342(1)       23(1)
          C(5)         6908(2)       2497(2)       8575(2)       38(1)
          C(6)         4570(2)        877(2)       6901(2)       38(1)
          C(7)         7238(2)         -8(2)       8367(2)       36(1)
          C(8)         3913(2)       3906(2)       5788(2)       39(1)
          C(9)         6473(2)       4549(2)       7047(2)       40(1)
          C(10)        4255(2)       3586(2)       4809(2)       34(1)
          C(11)        7746(2)       3099(2)       6327(2)       34(1)
          C(12)        5440(2)       1764(2)       4254(2)       36(1)
          C(13)        8192(2)       1068(2)       5824(2)       35(1)
          C(14)        8482(3)      -1627(2)       7877(2)       40(1)
          C(15)        8740(2)      -1755(2)       6827(2)       37(1)
          C(16)       10319(2)         42(3)       8579(2)       44(1)
          C(17)       10367(3)       3764(3)       9135(2)       61(1)
          C(18)       11097(3)       4325(2)      10111(2)       42(1)
          C(19)       11273(3)       3261(3)      10610(2)       58(1)
          C(20)       10015(3)       2542(2)       9657(2)       45(1)
          Li(1)        8222(4)       1930(4)       7509(3)       37(1)
          Li(2)        4384(3)        679(3)       5145(3)       31(1)
          O(1)         9578(2)       2792(2)       8806(1)       38(1)
          Si(1)        6066(1)       1313(1)       7549(1)       26(1)
          Si(2)        5090(1)       3406(1)       6073(1)       26(1)
          Si(3)        7174(1)       1528(1)       5707(1)       25(1)
          Si(4)        8646(1)       -694(1)       7359(1)       26(1)
         ________________________________________________________________

           Table 3.  Bond lengths [� and angles [deg] for dimer.
           _____________________________________________________________

            C(1)-C(2)                     1.434(3)
            C(1)-Si(2)                    1.841(2)
            C(1)-Si(1)                    1.8408(19)
            C(1)-Li(2)                    2.219(4)
            C(2)-C(3)                     1.246(3)
            C(2)-Li(2)                    2.094(4)
            C(2)-Li(1)                    2.301(4)
            C(3)-C(4)                     1.461(3)
            C(3)-Li(1)                    2.070(4)
            C(3)-Li(2)                    2.436(4)
            C(3)-Li(2)#1                  2.749(4)
            C(4)-Si(3)                    1.844(2)
            C(4)-Si(4)                    1.845(2)
            C(4)-Li(2)#1                  2.219(4)
            C(4)-Li(1)                    2.298(4)
            C(5)-Si(1)                    1.889(2)
            C(5)-H(5A)                    0.9600
            C(5)-H(5B)                    0.9600
            C(5)-H(5C)                    0.9610
            C(6)-Si(1)                    1.886(2)
            C(6)-H(6A)                    0.9599
            C(6)-H(6B)                    0.9596
            C(6)-H(6C)                    0.9596
            C(7)-Si(1)                    1.880(2)
            C(7)-H(7A)                    0.9592
            C(7)-H(7B)                    0.9600
            C(7)-H(7C)                    0.9611
            C(8)-Si(2)                    1.880(2)
            C(8)-H(8A)                    0.9586
            C(8)-H(8B)                    0.9597
            C(8)-H(8C)                    0.9599
            C(9)-Si(2)                    1.888(2)
            C(9)-H(9A)                    0.9595
            C(9)-H(9B)                    0.9600
            C(9)-H(9C)                    0.9607
            C(10)-Si(2)                   1.887(2)
            C(10)-H(10A)                  0.9603
            C(10)-H(10B)                  0.9592
            C(10)-H(10C)                  0.9599
            C(11)-Si(3)                   1.897(2)
            C(11)-Li(1)                   2.500(5)
            C(11)-H(11A)                  0.9601
            C(11)-H(11B)                  0.9605
            C(11)-H(11C)                  0.9602
            C(12)-Si(3)                   1.879(2)
            C(12)-H(12A)                  0.9604
            C(12)-H(12B)                  0.9593
            C(12)-H(12C)                  0.9597
            C(13)-Si(3)                   1.878(2)
            C(13)-H(13A)                  0.9602
            C(13)-H(13B)                  0.9593
            C(13)-H(13C)                  0.9607
            C(14)-Si(4)                   1.879(2)
            C(14)-H(14A)                  0.9602
            C(14)-H(14B)                  0.9612
            C(14)-H(14C)                  0.9598
            C(15)-Si(4)                   1.882(2)
            C(15)-H(15A)                  0.9598
            C(15)-H(15B)                  0.9598
            C(15)-H(15C)                  0.9596
            C(16)-Si(4)                   1.891(2)
            C(16)-H(16A)                  0.9595
            C(16)-H(16B)                  0.9605
            C(16)-H(16C)                  0.9604
            C(17)-O(1)                    1.449(3)
            C(17)-C(18)                   1.497(3)
            C(17)-H(17A)                  0.9603
            C(17)-H(17B)                  0.9599
            C(18)-C(19)                   1.501(4)
            C(18)-H(18A)                  0.9597
            C(18)-H(18B)                  0.9605
            C(19)-C(20)                   1.516(4)
            C(19)-H(19A)                  0.9606
            C(19)-H(19B)                  0.9607
            C(20)-O(1)                    1.441(3)
            C(20)-H(20A)                  0.9599
            C(20)-H(20B)                  0.9597
            Li(1)-O(1)                    1.878(4)
            Li(1)-Si(3)                   2.871(4)
            Li(1)-Si(4)                   3.112(4)
            Li(1)-H(11A)                  2.2910
            Li(1)-H(11C)                  2.2730
            Li(2)-C(4)#1                  2.219(4)
            Li(2)-C(3)#1                  2.749(4)
            Li(2)-Si(3)#1                 2.957(4)
            Li(2)-Li(2)#1                 3.459(7)
            Si(3)-Li(2)#1                 2.957(4)

            C(2)-C(1)-Si(2)             113.33(14)
            C(2)-C(1)-Si(1)             119.92(14)
            Si(2)-C(1)-Si(1)            118.89(10)
            C(2)-C(1)-Li(2)              65.94(14)
            Si(2)-C(1)-Li(2)            106.20(13)
            Si(1)-C(1)-Li(2)            120.97(14)
            C(3)-C(2)-C(1)              165.26(19)
            C(3)-C(2)-Li(2)              89.93(16)
            C(1)-C(2)-Li(2)              75.34(15)
            C(3)-C(2)-Li(1)              63.48(15)
            C(1)-C(2)-Li(1)             130.28(17)
            Li(2)-C(2)-Li(1)            148.85(16)
            C(2)-C(3)-C(4)              163.07(18)
            C(2)-C(3)-Li(1)              83.93(17)
            C(4)-C(3)-Li(1)              79.14(16)
            C(2)-C(3)-Li(2)              59.30(14)
            C(4)-C(3)-Li(2)             136.59(15)
            Li(1)-C(3)-Li(2)            139.84(17)
            C(2)-C(3)-Li(2)#1           142.77(16)
            C(4)-C(3)-Li(2)#1            53.58(12)
            Li(1)-C(3)-Li(2)#1          131.43(16)
            Li(2)-C(3)-Li(2)#1           83.47(13)
            C(3)-C(4)-Si(3)             113.53(13)
            C(3)-C(4)-Si(4)             118.33(13)
            Si(3)-C(4)-Si(4)            122.97(10)
            C(3)-C(4)-Li(2)#1            94.42(15)
            Si(3)-C(4)-Li(2)#1           92.98(12)
            Si(4)-C(4)-Li(2)#1          104.81(13)
            C(3)-C(4)-Li(1)              62.23(14)
            Si(3)-C(4)-Li(1)             87.05(13)
            Si(4)-C(4)-Li(1)             96.77(13)
            Li(2)#1-C(4)-Li(1)          154.08(17)
            Si(1)-C(5)-H(5A)            109.5
            Si(1)-C(5)-H(5B)            109.1
            H(5A)-C(5)-H(5B)            109.4
            Si(1)-C(5)-H(5C)            109.8
            H(5A)-C(5)-H(5C)            109.5
            H(5B)-C(5)-H(5C)            109.5
            Si(1)-C(6)-H(6A)            109.4
            Si(1)-C(6)-H(6B)            109.5
            H(6A)-C(6)-H(6B)            109.5
            Si(1)-C(6)-H(6C)            109.4
            H(6A)-C(6)-H(6C)            109.4
            H(6B)-C(6)-H(6C)            109.5
            Si(1)-C(7)-H(7A)            109.3
            Si(1)-C(7)-H(7B)            109.6
            H(7A)-C(7)-H(7B)            109.5
            Si(1)-C(7)-H(7C)            109.4
            H(7A)-C(7)-H(7C)            109.4
            H(7B)-C(7)-H(7C)            109.5
            Si(2)-C(8)-H(8A)            109.1
            Si(2)-C(8)-H(8B)            109.8
            H(8A)-C(8)-H(8B)            109.6
            Si(2)-C(8)-H(8C)            109.3
            H(8A)-C(8)-H(8C)            109.5
            H(8B)-C(8)-H(8C)            109.4
            Si(2)-C(9)-H(9A)            109.4
            Si(2)-C(9)-H(9B)            109.5
            H(9A)-C(9)-H(9B)            109.5
            Si(2)-C(9)-H(9C)            109.5
            H(9A)-C(9)-H(9C)            109.5
            H(9B)-C(9)-H(9C)            109.4
            Si(2)-C(10)-H(10A)          109.5
            Si(2)-C(10)-H(10B)          109.5
            H(10A)-C(10)-H(10B)         109.5
            Si(2)-C(10)-H(10C)          109.4
            H(10A)-C(10)-H(10C)         109.5
            H(10B)-C(10)-H(10C)         109.4
            Si(3)-C(11)-Li(1)            80.27(12)
            Si(3)-C(11)-H(11A)          109.5
            Li(1)-C(11)-H(11A)           66.4
            Si(3)-C(11)-H(11B)          109.5
            Li(1)-C(11)-H(11B)          170.2
            H(11A)-C(11)-H(11B)         109.5
            Si(3)-C(11)-H(11C)          109.4
            Li(1)-C(11)-H(11C)           65.3
            H(11A)-C(11)-H(11C)         109.4
            H(11B)-C(11)-H(11C)         109.5
            Si(3)-C(12)-H(12A)          109.8
            Si(3)-C(12)-H(12B)          109.4
            H(12A)-C(12)-H(12B)         109.4
            Si(3)-C(12)-H(12C)          109.2
            H(12A)-C(12)-H(12C)         109.5
            H(12B)-C(12)-H(12C)         109.5
            Si(3)-C(13)-H(13A)          109.4
            Si(3)-C(13)-H(13B)          109.5
            H(13A)-C(13)-H(13B)         109.5
            Si(3)-C(13)-H(13C)          109.6
            H(13A)-C(13)-H(13C)         109.4
            H(13B)-C(13)-H(13C)         109.5
            Si(4)-C(14)-H(14A)          109.9
            Si(4)-C(14)-H(14B)          109.3
            H(14A)-C(14)-H(14B)         109.4
            Si(4)-C(14)-H(14C)          109.4
            H(14A)-C(14)-H(14C)         109.5
            H(14B)-C(14)-H(14C)         109.4
            Si(4)-C(15)-H(15A)          109.3
            Si(4)-C(15)-H(15B)          109.5
            H(15A)-C(15)-H(15B)         109.5
            Si(4)-C(15)-H(15C)          109.5
            H(15A)-C(15)-H(15C)         109.4
            H(15B)-C(15)-H(15C)         109.5
            Si(4)-C(16)-H(16A)          109.7
            Si(4)-C(16)-H(16B)          109.3
            H(16A)-C(16)-H(16B)         109.5
            Si(4)-C(16)-H(16C)          109.5
            H(16A)-C(16)-H(16C)         109.5
            H(16B)-C(16)-H(16C)         109.4
            O(1)-C(17)-C(18)            106.6(2)
            O(1)-C(17)-H(17A)           108.5
            C(18)-C(17)-H(17A)          110.6
            O(1)-C(17)-H(17B)           109.9
            C(18)-C(17)-H(17B)          111.8
            H(17A)-C(17)-H(17B)         109.5
            C(17)-C(18)-C(19)           102.2(2)
            C(17)-C(18)-H(18A)          112.1
            C(19)-C(18)-H(18A)          108.9
            C(17)-C(18)-H(18B)          113.9
            C(19)-C(18)-H(18B)          110.0
            H(18A)-C(18)-H(18B)         109.5
            C(18)-C(19)-C(20)           103.6(2)
            C(18)-C(19)-H(19A)          113.0
            C(20)-C(19)-H(19A)          109.8
            C(18)-C(19)-H(19B)          111.8
            C(20)-C(19)-H(19B)          108.8
            H(19A)-C(19)-H(19B)         109.6
            O(1)-C(20)-C(19)            105.5(2)
            O(1)-C(20)-H(20A)           109.1
            C(19)-C(20)-H(20A)          111.0
            O(1)-C(20)-H(20B)           109.4
            C(19)-C(20)-H(20B)          112.2
            H(20A)-C(20)-H(20B)         109.5
            O(1)-Li(1)-C(3)             154.1(2)
            O(1)-Li(1)-C(4)             156.8(2)
            C(3)-Li(1)-C(4)              38.63(9)
            O(1)-Li(1)-C(2)             124.9(2)
            C(3)-Li(1)-C(2)              32.59(9)
            C(4)-Li(1)-C(2)              71.22(12)
            O(1)-Li(1)-C(11)            105.27(18)
            C(3)-Li(1)-C(11)             97.99(16)
            C(4)-Li(1)-C(11)             80.45(14)
            C(2)-Li(1)-C(11)            110.55(17)
            O(1)-Li(1)-Si(3)            139.95(19)
            C(3)-Li(1)-Si(3)             65.94(11)
            C(4)-Li(1)-Si(3)             39.89(8)
            C(2)-Li(1)-Si(3)             92.40(13)
            C(11)-Li(1)-Si(3)            40.62(8)
            O(1)-Li(1)-Si(4)            121.55(19)
            C(3)-Li(1)-Si(4)             62.88(12)
            C(4)-Li(1)-Si(4)             36.07(8)
            C(2)-Li(1)-Si(4)             90.44(13)
            C(11)-Li(1)-Si(4)           101.77(14)
            Si(3)-Li(1)-Si(4)            65.46(8)
            O(1)-Li(1)-H(11A)           103.8
            C(3)-Li(1)-H(11A)            93.2
            C(4)-Li(1)-H(11A)            89.9
            C(2)-Li(1)-H(11A)            94.8
            C(11)-Li(1)-H(11A)           22.6
            Si(3)-Li(1)-H(11A)           53.9
            Si(4)-Li(1)-H(11A)          119.2
            O(1)-Li(1)-H(11C)            87.1
            C(3)-Li(1)-H(11C)           118.0
            C(4)-Li(1)-H(11C)            91.9
            C(2)-Li(1)-H(11C)           133.0
            C(11)-Li(1)-H(11C)           22.6
            Si(3)-Li(1)-H(11C)           54.0
            Si(4)-Li(1)-H(11C)          100.9
            H(11A)-Li(1)-H(11C)          40.2
            C(2)-Li(2)-C(1)              38.71(9)
            C(2)-Li(2)-C(4)#1           158.8(2)
            C(1)-Li(2)-C(4)#1           161.9(2)
            C(2)-Li(2)-C(3)              30.77(8)
            C(1)-Li(2)-C(3)              69.48(12)
            C(4)#1-Li(2)-C(3)           128.25(18)
            C(2)-Li(2)-C(3)#1           127.29(17)
            C(1)-Li(2)-C(3)#1           166.00(18)
            C(4)#1-Li(2)-C(3)#1          31.99(8)
            C(3)-Li(2)-C(3)#1            96.52(13)
            C(2)-Li(2)-Si(3)#1          139.68(17)
            C(1)-Li(2)-Si(3)#1          130.55(16)
            C(4)#1-Li(2)-Si(3)#1         38.50(8)
            C(3)-Li(2)-Si(3)#1          127.87(15)
            C(3)#1-Li(2)-Si(3)#1         57.99(8)
            C(2)-Li(2)-Li(2)#1           82.90(15)
            C(1)-Li(2)-Li(2)#1          121.61(19)
            C(4)#1-Li(2)-Li(2)#1         76.24(14)
            C(3)-Li(2)-Li(2)#1           52.13(10)
            C(3)#1-Li(2)-Li(2)#1         44.39(9)
            Si(3)#1-Li(2)-Li(2)#1        90.63(14)
            C(20)-O(1)-C(17)            109.07(17)
            C(20)-O(1)-Li(1)            123.64(19)
            C(17)-O(1)-Li(1)            127.27(19)
            C(1)-Si(1)-C(7)             112.20(9)
            C(1)-Si(1)-C(6)             111.73(9)
            C(7)-Si(1)-C(6)             108.95(11)
            C(1)-Si(1)-C(5)             115.12(10)
            C(7)-Si(1)-C(5)             104.15(10)
            C(6)-Si(1)-C(5)             104.08(11)
            C(1)-Si(2)-C(8)             111.76(10)
            C(1)-Si(2)-C(10)            110.81(9)
            C(8)-Si(2)-C(10)            108.14(11)
            C(1)-Si(2)-C(9)             113.65(10)
            C(8)-Si(2)-C(9)             106.53(12)
            C(10)-Si(2)-C(9)            105.58(11)
            C(4)-Si(3)-C(12)            112.27(10)
            C(4)-Si(3)-C(13)            111.85(10)
            C(12)-Si(3)-C(13)           108.46(10)
            C(4)-Si(3)-C(11)            112.06(9)
            C(12)-Si(3)-C(11)           104.55(11)
            C(13)-Si(3)-C(11)           107.26(11)
            C(4)-Si(3)-Li(1)             53.06(10)
            C(12)-Si(3)-Li(1)           127.63(11)
            C(13)-Si(3)-Li(1)           123.80(11)
            C(11)-Si(3)-Li(1)            59.11(11)
            C(4)-Si(3)-Li(2)#1           48.52(9)
            C(12)-Si(3)-Li(2)#1          70.66(11)
            C(13)-Si(3)-Li(2)#1         103.78(11)
            C(11)-Si(3)-Li(2)#1         148.34(10)
            Li(1)-Si(3)-Li(2)#1          98.07(11)
            C(4)-Si(4)-C(14)            110.95(10)
            C(4)-Si(4)-C(15)            112.22(9)
            C(14)-Si(4)-C(15)           108.76(12)
            C(4)-Si(4)-C(16)            113.87(11)
            C(14)-Si(4)-C(16)           105.37(12)
            C(15)-Si(4)-C(16)           105.24(11)
            C(4)-Si(4)-Li(1)             47.16(9)
            C(14)-Si(4)-Li(1)           101.23(11)
            C(15)-Si(4)-Li(1)           149.02(11)
            C(16)-Si(4)-Li(1)            73.20(11)
           _____________________________________________________________

           Symmetry transformations used to generate equivalent atoms:
           #1 -x+1,-y,-z+1

    Table 4.  Anisotropic displacement parameters (A^2 x 10^3) for dimer.
    The anisotropic displacement factor exponent takes the form:
    -2 pi^2 [ h^2 a*^2 U11 + ... + 2 h k a* b* U12 ]

    _______________________________________________________________________

              U11        U22        U33        U23        U13        U12
    _______________________________________________________________________

    C(1)     25(1)      25(1)      21(1)      -1(1)      20(1)       0(1)
    C(2)     21(1)      21(1)      15(1)      -2(1)      15(1)      -2(1)
    C(3)     21(1)      23(1)      16(1)      -2(1)      15(1)      -2(1)
    C(4)     23(1)      27(1)      18(1)      -3(1)      18(1)      -2(1)
    C(5)     44(1)      40(1)      31(1)      -5(1)      33(1)      -2(1)
    C(6)     40(1)      46(1)      35(1)       0(1)      34(1)      -3(1)
    C(7)     41(1)      36(1)      26(1)       4(1)      28(1)       6(1)
    C(8)     43(1)      38(1)      36(1)       6(1)      34(1)      12(1)
    C(9)     46(1)      29(1)      35(1)      -6(1)      33(1)      -7(1)
    C(10)    37(1)      32(1)      27(1)       0(1)      26(1)      -2(1)
    C(11)    38(1)      32(1)      33(1)      -1(1)      31(1)      -4(1)
    C(12)    31(1)      41(1)      22(1)       1(1)      21(1)       2(1)
    C(13)    36(1)      47(1)      29(1)       3(1)      29(1)       2(1)
    C(14)    47(1)      43(1)      39(1)      13(1)      38(1)      11(1)
    C(15)    36(1)      39(1)      38(1)       2(1)      32(1)       6(1)
    C(16)    26(1)      56(2)      23(1)       0(1)      17(1)       1(1)
    C(17)    69(2)      74(2)      47(2)     -35(1)      51(2)     -47(2)
    C(18)    48(1)      44(1)      38(1)     -15(1)      37(1)     -17(1)
    C(19)    64(2)      48(2)      33(1)     -11(1)      38(1)     -21(1)
    C(20)    55(1)      45(1)      37(1)     -11(1)      40(1)     -18(1)
    Li(1)    32(2)      42(2)      27(2)     -10(2)      24(2)     -11(2)
    Li(2)    27(2)      37(2)      23(2)      -5(1)      20(2)      -5(1)
    O(1)     38(1)      44(1)      28(1)     -14(1)      28(1)     -18(1)
    Si(1)    30(1)      27(1)      21(1)      -1(1)      22(1)       0(1)
    Si(2)    30(1)      23(1)      22(1)      -1(1)      22(1)       1(1)
    Si(3)    24(1)      29(1)      18(1)       0(1)      18(1)      -1(1)
    Si(4)    23(1)      31(1)      19(1)       2(1)      17(1)       2(1)
    _______________________________________________________________________

         Table 5.  Hydrogen coordinates ( x 10^4) and isotropic
         displacement parameters (A^2 x 10^3) for dimer.

         ________________________________________________________________

                         x             y             z           U(eq)
         ________________________________________________________________

          H(5A)        6367          3211          8219          50
          H(5B)        7731          2709          8991          50
          H(5C)        7058          2174          9037          50
          H(6A)        3965          1547          6480          50
          H(6B)        4823           681          7443          50
          H(6C)        4160           181          6449          50
          H(7A)        8002           210          8700          50
          H(7B)        6825          -703          7913          50
          H(7C)        7488          -203          8908          50
          H(8A)        4324          3819          6424          50
          H(8B)        3137          3413          5229          50
          H(8C)        3683          4745          5569          50
          H(9A)        6938          4498          7711          50
          H(9B)        6124          5356          6758          50
          H(9C)        7061          4373          7167          50
          H(10A)       3536          3024          4279          50
          H(10B)       4870          3422          4957          50
          H(10C)       3934          4405          4548          50
          H(11A)       7243          3364          6280          50
          H(11B)       7630          3664          5952          50
          H(11C)       8656          3064          7064          50
          H(12A)       4901          2000          4176          50
          H(12B)       5111          1020          3870          50
          H(12C)       5424          2394          3973          50
          H(13A)       9081           941          6563          50
          H(13B)       8165          1701          5537          50
          H(13C)       7852           326          5433          50
          H(14A)       7646         -2028          7294          50
          H(14B)       8553         -1101          8237          50
          H(14C)       9167         -2226          8370          50
          H(15A)       7914         -2161          6202          50
          H(15B)       9415         -2349          7362          50
          H(15C)       8936         -1296          6644          50
          H(16A)      10340           600          8893          50
          H(16B)      10494           476          8372          50
          H(16C)      10973          -577          9090          50
          H(17A)      10966          3417          9299          50
          H(17B)       9814          4346          8567          50
          H(18A)      10591          4940          9936          50
          H(18B)      11936          4654         10603          50
          H(19A)      11374          3500         11053          50
          H(19B)      11998          2756         11014          50
          H(20A)       9359          2812          9447          50
          H(20B)      10150          1681          9794          50
         ________________________________________________________________
====================================================
							END