# Electronic Supplementary Material (ESI) for Chemical Communications
# This journal is © The Royal Society of Chemistry 2013

#######################################################################
#
#                 Cambridge Crystallographic Data Centre
#                                CCDC 
# 
#######################################################################
# 
#  This CIF contains data from an original supplementary publication
#  deposited with the CCDC, and may include chemical, crystal,
#  experimental, refinement, atomic coordinates,
#  anisotropic displacement parameters and molecular geometry data,
#  as required by the journal to which it was submitted.
#
#  This CIF is provided on the understanding that it is used for bona
#  fide research purposes only. It may contain copyright material
#  of the CCDC or of third parties, and may not be copied or further
#  disseminated in any form, whether machine-readable or not,
#  except for the purpose of generating routine backup copies
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#  data retrieval see:
#                         www.ccdc.cam.ac.uk
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#  from this site to visualise CIF-encoded structures and 
#  to carry out CIF format checking respectively.
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data_sa2478
#TrackingRef '19303_web_deposit_cif_file_0_YefengTang_1365515048.sa2478.cif'


_audit_creation_method           SHELXL-97
_chemical_name_systematic        
;
?
;
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         'C24 H27 N O3 Si'
_chemical_formula_sum            'C24 H27 N O3 Si'
_chemical_formula_weight         405.56
_chemical_absolute_configuration unk

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Si Si 0.0817 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   P2(1)2(1)2(1)

loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x+1/2, -y, z+1/2'
'-x, y+1/2, -z+1/2'
'x+1/2, -y+1/2, -z'

_cell_length_a                   11.284(3)
_cell_length_b                   14.658(3)
_cell_length_c                   27.222(7)
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_volume                     4502.4(18)
_cell_formula_units_Z            8
_cell_measurement_temperature    173(2)
_cell_measurement_reflns_used    15048
_cell_measurement_theta_min      1.39
_cell_measurement_theta_max      27.48

_exptl_crystal_description       plate
_exptl_crystal_colour            colorless
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.09
_exptl_crystal_density_meas      ?
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1728
_exptl_absorpt_coefficient_mu    0.128
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  0.6035
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'


_exptl_special_details           
;
?
;

_diffrn_ambient_temperature      173(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_monochromator  graphite
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_detector_area_resol_mean ?
_diffrn_standards_number         ?
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%        ?
_diffrn_reflns_number            44582
_diffrn_reflns_av_R_equivalents  0.0670
_diffrn_reflns_av_sigmaI/netI    0.0346
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_theta_min         1.95
_diffrn_reflns_theta_max         27.47
_reflns_number_total             5686
_reflns_number_gt                5586
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_computing_structure_refinement  'Olex2 ver 1.1'
_computing_molecular_graphics    'Olex2 ver 1.1'
_computing_publication_material  'SHELX97 (Sheldrick, 2008)'


_refine_special_details          
;
Refinement of F^2^ against ALL reflections. The weighted R-factor wR and
goodness of fit S are based on F^2^, conventional R-factors R are based
on F, with F set to zero for negative F^2^. The threshold expression of
F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is
not relevant to the choice of reflections for refinement. R-factors based
on F^2^ are statistically about twice as large as those based on F, and R-
factors based on ALL data will be even larger.
;

_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'calc w=1/[\s^2^(Fo^2^)+(0.0385P)^2^+2.0383P] where P=(Fo^2^+2Fc^2^)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     none
_refine_ls_extinction_coef       ?
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -10(10)
_refine_ls_number_reflns         5686
_refine_ls_number_parameters     535
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0594
_refine_ls_R_factor_gt           0.0575
_refine_ls_wR_factor_ref         0.1284
_refine_ls_wR_factor_gt          0.1275
_refine_ls_goodness_of_fit_ref   1.274
_refine_ls_restrained_S_all      1.274
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
Si1 Si 0.25556(10) 0.56775(8) 0.48309(4) 0.0378(2) Uani 1 1 d . . .
Si2 Si 0.69416(9) 0.35258(7) 0.54323(3) 0.0285(2) Uani 1 1 d . . .
O1 O -0.0630(3) 0.22668(19) 0.21165(10) 0.0488(8) Uani 1 1 d . . .
O2 O 0.0536(3) 0.25567(17) 0.30527(9) 0.0369(6) Uani 1 1 d . . .
H2 H 0.0162 0.2084 0.2973 0.055 Uiso 1 1 calc R . .
O3 O 0.3287(2) 0.55914(17) 0.43028(8) 0.0343(6) Uani 1 1 d . . .
O4 O 1.0797(3) 0.78073(19) 0.78471(11) 0.0478(7) Uani 1 1 d . . .
O5 O 0.9661(3) 0.75001(17) 0.68986(9) 0.0410(7) Uani 1 1 d . . .
H5 H 1.0028 0.7979 0.6974 0.061 Uiso 1 1 calc R . .
O6 O 0.6554(2) 0.44525(17) 0.57467(9) 0.0351(6) Uani 1 1 d . . .
N1 N 0.0597(3) 0.5929(2) 0.19726(11) 0.0323(6) Uani 1 1 d . . .
N2 N 0.9394(3) 0.4203(2) 0.80383(11) 0.0334(7) Uani 1 1 d . . .
C1 C 0.1018(3) 0.4374(2) 0.21445(12) 0.0275(7) Uani 1 1 d . . .
C2 C 0.0199(3) 0.5195(2) 0.21674(13) 0.0316(7) Uani 1 1 d . . .
H2A H -0.0561 0.5166 0.2317 0.038 Uiso 1 1 calc R . .
C3 C 0.2067(3) 0.4823(2) 0.19005(11) 0.0267(7) Uani 1 1 d . . .
C4 C 0.1771(3) 0.5727(2) 0.18038(12) 0.0306(7) Uani 1 1 d . . .
C5 C 0.2544(4) 0.6320(3) 0.15763(13) 0.0382(8) Uani 1 1 d . . .
H5A H 0.2328 0.6935 0.1512 0.046 Uiso 1 1 calc R . .
C6 C 0.3650(4) 0.5988(3) 0.14437(15) 0.0448(10) Uani 1 1 d . . .
H6 H 0.4206 0.6381 0.1290 0.054 Uiso 1 1 calc R . .
C7 C 0.3948(3) 0.5095(3) 0.15333(14) 0.0436(10) Uani 1 1 d . . .
H7 H 0.4707 0.4882 0.1435 0.052 Uiso 1 1 calc R . .
C8 C 0.3170(3) 0.4490(3) 0.17648(12) 0.0340(8) Uani 1 1 d . . .
H8 H 0.3389 0.3875 0.1827 0.041 Uiso 1 1 calc R . .
C9 C 0.0421(4) 0.3615(3) 0.18279(13) 0.0358(8) Uani 1 1 d . . .
H9A H -0.0274 0.3860 0.1649 0.043 Uiso 1 1 calc R . .
H9B H 0.0989 0.3361 0.1587 0.043 Uiso 1 1 calc R . .
C10 C 0.0047(3) 0.2897(2) 0.21924(14) 0.0332(8) Uani 1 1 d . . .
C11 C 0.0646(3) 0.3102(2) 0.26627(13) 0.0283(7) Uani 1 1 d . . .
C12 C 0.1213(3) 0.3916(2) 0.26425(12) 0.0257(7) Uani 1 1 d . . .
C13 C 0.1850(3) 0.4350(2) 0.30504(11) 0.0251(6) Uani 1 1 d . . .
C14 C 0.2273(3) 0.3821(2) 0.34438(12) 0.0301(7) Uani 1 1 d . . .
H14 H 0.2220 0.3175 0.3428 0.036 Uiso 1 1 calc R . .
C15 C 0.2768(3) 0.4235(2) 0.38572(12) 0.0317(7) Uani 1 1 d . . .
H15 H 0.3060 0.3868 0.4119 0.038 Uiso 1 1 calc R . .
C16 C 0.2838(3) 0.5182(2) 0.38888(12) 0.0303(7) Uani 1 1 d . . .
C17 C 0.2469(3) 0.5714(2) 0.34963(12) 0.0309(7) Uani 1 1 d . . .
H17 H 0.2549 0.6358 0.3510 0.037 Uiso 1 1 calc R . .
C18 C 0.1980(3) 0.5301(2) 0.30817(12) 0.0284(7) Uani 1 1 d . . .
H18 H 0.1730 0.5671 0.2815 0.034 Uiso 1 1 calc R . .
C19 C 0.2739(6) 0.4626(3) 0.52100(18) 0.0707(17) Uani 1 1 d . . .
H19A H 0.3584 0.4519 0.5271 0.106 Uiso 1 1 calc R . .
H19B H 0.2405 0.4102 0.5034 0.106 Uiso 1 1 calc R . .
H19C H 0.2325 0.4703 0.5524 0.106 Uiso 1 1 calc R . .
C20 C 0.0960(4) 0.5843(5) 0.4681(2) 0.0787(18) Uani 1 1 d . . .
H20A H 0.0667 0.5313 0.4499 0.118 Uiso 1 1 calc R . .
H20B H 0.0866 0.6393 0.4481 0.118 Uiso 1 1 calc R . .
H20C H 0.0506 0.5911 0.4986 0.118 Uiso 1 1 calc R . .
C21 C 0.3222(4) 0.6692(3) 0.51442(14) 0.0419(9) Uani 1 1 d . . .
C22 C 0.4520(5) 0.6514(4) 0.5274(2) 0.0716(16) Uani 1 1 d . . .
H22A H 0.4978 0.6425 0.4972 0.107 Uiso 1 1 calc R . .
H22B H 0.4577 0.5966 0.5479 0.107 Uiso 1 1 calc R . .
H22C H 0.4838 0.7038 0.5455 0.107 Uiso 1 1 calc R . .
C23 C 0.3144(5) 0.7522(3) 0.48045(19) 0.0659(14) Uani 1 1 d . . .
H23A H 0.2317 0.7618 0.4707 0.099 Uiso 1 1 calc R . .
H23B H 0.3628 0.7416 0.4511 0.099 Uiso 1 1 calc R . .
H23C H 0.3435 0.8063 0.4978 0.099 Uiso 1 1 calc R . .
C24 C 0.2516(6) 0.6898(4) 0.56156(19) 0.0812(19) Uani 1 1 d . . .
H24A H 0.2564 0.6375 0.5839 0.122 Uiso 1 1 calc R . .
H24B H 0.1684 0.7013 0.5531 0.122 Uiso 1 1 calc R . .
H24C H 0.2848 0.7439 0.5777 0.122 Uiso 1 1 calc R . .
C25 C 0.9052(3) 0.5760(2) 0.78373(11) 0.0258(7) Uani 1 1 d . . .
C26 C 0.9846(3) 0.4920(2) 0.78409(12) 0.0304(7) Uani 1 1 d . . .
H26 H 1.0623 0.4926 0.7706 0.036 Uiso 1 1 calc R . .
C27 C 0.7962(3) 0.5346(2) 0.80710(11) 0.0271(7) Uani 1 1 d . . .
C28 C 0.8211(3) 0.4435(2) 0.81833(12) 0.0302(7) Uani 1 1 d . . .
C29 C 0.7392(4) 0.3865(3) 0.83905(13) 0.0435(10) Uani 1 1 d . . .
H29 H 0.7575 0.3245 0.8459 0.052 Uiso 1 1 calc R . .
C30 C 0.6285(4) 0.4224(4) 0.84973(15) 0.0515(12) Uani 1 1 d . . .
H30 H 0.5692 0.3844 0.8637 0.062 Uiso 1 1 calc R . .
C31 C 0.6035(4) 0.5135(3) 0.84012(14) 0.0460(10) Uani 1 1 d . . .
H31 H 0.5280 0.5374 0.8487 0.055 Uiso 1 1 calc R . .
C32 C 0.6865(3) 0.5703(3) 0.81828(12) 0.0350(8) Uani 1 1 d . . .
H32 H 0.6682 0.6322 0.8112 0.042 Uiso 1 1 calc R . .
C33 C 0.9632(3) 0.6532(3) 0.81457(13) 0.0339(8) Uani 1 1 d . . .
H33A H 0.9041 0.6824 0.8364 0.041 Uiso 1 1 calc R . .
H33B H 1.0288 0.6290 0.8349 0.041 Uiso 1 1 calc R . .
C34 C 1.0088(3) 0.7198(2) 0.77718(14) 0.0327(8) Uani 1 1 d . . .
C35 C 0.9516(3) 0.6982(2) 0.73018(13) 0.0293(7) Uani 1 1 d . . .
C36 C 0.8908(3) 0.6187(2) 0.73244(12) 0.0258(7) Uani 1 1 d . . .
C37 C 0.8257(3) 0.5736(2) 0.69259(11) 0.0246(6) Uani 1 1 d . . .
C38 C 0.7900(3) 0.6218(2) 0.65042(12) 0.0328(8) Uani 1 1 d . . .
H38 H 0.8047 0.6855 0.6484 0.039 Uiso 1 1 calc R . .
C39 C 0.7341(3) 0.5785(2) 0.61203(12) 0.0345(8) Uani 1 1 d . . .
H39 H 0.7107 0.6125 0.5840 0.041 Uiso 1 1 calc R . .
C40 C 0.7118(3) 0.4852(2) 0.61403(12) 0.0282(7) Uani 1 1 d . . .
C41 C 0.7432(3) 0.4365(2) 0.65539(11) 0.0286(7) Uani 1 1 d . . .
H41 H 0.7261 0.3731 0.6574 0.034 Uiso 1 1 calc R . .
C42 C 0.8000(3) 0.4802(2) 0.69409(12) 0.0271(7) Uani 1 1 d . . .
H42 H 0.8219 0.4459 0.7223 0.033 Uiso 1 1 calc R . .
C43 C 0.8441(4) 0.3134(3) 0.56277(15) 0.0409(9) Uani 1 1 d . . .
H43A H 0.8407 0.2917 0.5968 0.061 Uiso 1 1 calc R . .
H43B H 0.9002 0.3643 0.5605 0.061 Uiso 1 1 calc R . .
H43C H 0.8704 0.2637 0.5413 0.061 Uiso 1 1 calc R . .
C44 C 0.5778(4) 0.2660(3) 0.55474(16) 0.0476(10) Uani 1 1 d . . .
H44A H 0.5002 0.2912 0.5460 0.071 Uiso 1 1 calc R . .
H44B H 0.5781 0.2492 0.5896 0.071 Uiso 1 1 calc R . .
H44C H 0.5936 0.2117 0.5348 0.071 Uiso 1 1 calc R . .
C45 C 0.6977(4) 0.3890(3) 0.47702(13) 0.0388(8) Uani 1 1 d . . .
C46 C 0.7917(6) 0.4624(4) 0.47129(18) 0.085(2) Uani 1 1 d . . .
H46A H 0.8695 0.4370 0.4796 0.127 Uiso 1 1 calc R . .
H46B H 0.7737 0.5134 0.4933 0.127 Uiso 1 1 calc R . .
H46C H 0.7924 0.4841 0.4372 0.127 Uiso 1 1 calc R . .
C47 C 0.7295(5) 0.3084(4) 0.44384(16) 0.0629(14) Uani 1 1 d . . .
H47A H 0.6682 0.2613 0.4466 0.094 Uiso 1 1 calc R . .
H47B H 0.8061 0.2830 0.4540 0.094 Uiso 1 1 calc R . .
H47C H 0.7347 0.3292 0.4097 0.094 Uiso 1 1 calc R . .
C48 C 0.5789(5) 0.4261(4) 0.46095(17) 0.0647(14) Uani 1 1 d . . .
H48A H 0.5562 0.4770 0.4823 0.097 Uiso 1 1 calc R . .
H48B H 0.5191 0.3778 0.4632 0.097 Uiso 1 1 calc R . .
H48C H 0.5843 0.4475 0.4269 0.097 Uiso 1 1 calc R . .

loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
Si1 0.0440(6) 0.0376(6) 0.0317(5) -0.0063(4) 0.0031(4) -0.0044(5)
Si2 0.0304(5) 0.0286(4) 0.0265(4) -0.0024(4) -0.0023(4) -0.0016(4)
O1 0.062(2) 0.0378(15) 0.0467(16) 0.0013(13) -0.0165(15) -0.0196(15)
O2 0.0517(16) 0.0283(13) 0.0309(12) 0.0030(10) -0.0089(12) -0.0133(12)
O3 0.0384(14) 0.0384(14) 0.0263(11) -0.0062(10) -0.0039(10) -0.0050(12)
O4 0.0581(19) 0.0355(14) 0.0498(16) 0.0025(13) -0.0166(15) -0.0172(14)
O5 0.0606(18) 0.0294(13) 0.0328(13) 0.0048(11) -0.0044(13) -0.0159(13)
O6 0.0387(14) 0.0362(13) 0.0303(12) -0.0093(10) -0.0065(10) 0.0056(12)
N1 0.0348(16) 0.0328(16) 0.0293(14) 0.0009(12) -0.0018(12) 0.0036(14)
N2 0.0415(17) 0.0295(15) 0.0291(14) 0.0024(12) -0.0015(13) 0.0057(14)
C1 0.0296(16) 0.0234(16) 0.0296(16) 0.0006(13) -0.0027(13) -0.0015(15)
C2 0.0307(17) 0.0348(18) 0.0294(17) -0.0008(14) -0.0010(14) 0.0028(16)
C3 0.0321(17) 0.0262(16) 0.0217(14) -0.0004(12) -0.0032(13) -0.0016(14)
C4 0.0383(19) 0.0285(16) 0.0251(15) -0.0010(13) -0.0050(14) -0.0022(16)
C5 0.048(2) 0.0316(19) 0.0347(18) 0.0021(14) 0.0001(16) -0.0079(19)
C6 0.043(2) 0.057(3) 0.0347(19) 0.0000(19) 0.0021(17) -0.016(2)
C7 0.0264(17) 0.071(3) 0.0336(19) -0.0026(19) -0.0011(15) -0.002(2)
C8 0.0305(18) 0.045(2) 0.0265(16) 0.0008(15) -0.0045(14) 0.0069(17)
C9 0.042(2) 0.0330(18) 0.0329(18) 0.0017(15) -0.0073(15) -0.0076(17)
C10 0.0317(18) 0.0268(17) 0.041(2) -0.0012(15) -0.0076(15) -0.0007(15)
C11 0.0316(18) 0.0250(16) 0.0282(16) 0.0004(13) -0.0026(14) 0.0025(15)
C12 0.0271(16) 0.0218(15) 0.0282(16) -0.0013(13) -0.0007(13) 0.0039(14)
C13 0.0250(15) 0.0245(15) 0.0259(14) -0.0035(12) 0.0015(13) -0.0026(14)
C14 0.0313(18) 0.0278(17) 0.0310(16) 0.0014(13) -0.0034(14) 0.0020(15)
C15 0.0351(18) 0.0295(17) 0.0305(16) 0.0016(14) -0.0067(14) -0.0014(16)
C16 0.0331(19) 0.0310(17) 0.0269(16) -0.0042(14) 0.0012(13) -0.0031(15)
C17 0.0377(18) 0.0256(17) 0.0295(16) -0.0004(13) 0.0003(14) -0.0078(17)
C18 0.0307(17) 0.0258(16) 0.0288(16) 0.0017(13) 0.0014(14) -0.0014(15)
C19 0.121(5) 0.042(2) 0.048(3) 0.007(2) 0.022(3) -0.006(3)
C20 0.041(3) 0.115(5) 0.080(4) -0.036(4) 0.008(2) -0.005(3)
C21 0.057(3) 0.035(2) 0.0343(19) -0.0061(15) -0.0096(19) 0.0052(19)
C22 0.071(3) 0.055(3) 0.089(4) -0.017(3) -0.034(3) -0.003(3)
C23 0.087(4) 0.038(2) 0.073(3) 0.003(2) -0.022(3) -0.006(3)
C24 0.117(5) 0.078(4) 0.048(3) -0.029(3) 0.007(3) 0.004(4)
C25 0.0263(15) 0.0238(15) 0.0274(15) 0.0010(13) -0.0025(12) -0.0011(14)
C26 0.0296(17) 0.0333(18) 0.0283(16) 0.0027(14) -0.0009(14) 0.0030(16)
C27 0.0296(17) 0.0322(17) 0.0197(14) -0.0010(12) -0.0020(13) 0.0001(15)
C28 0.0332(18) 0.0306(17) 0.0269(16) -0.0014(14) -0.0007(14) -0.0029(16)
C29 0.060(3) 0.040(2) 0.0305(18) 0.0059(16) -0.0012(18) -0.015(2)
C30 0.047(2) 0.072(3) 0.036(2) 0.004(2) -0.0002(18) -0.027(2)
C31 0.0307(19) 0.079(3) 0.0286(18) -0.003(2) -0.0028(15) -0.001(2)
C32 0.0321(18) 0.047(2) 0.0258(16) -0.0058(15) -0.0039(14) 0.0035(18)
C33 0.0373(19) 0.0319(17) 0.0325(17) -0.0024(15) -0.0086(15) -0.0005(17)
C34 0.0368(19) 0.0248(16) 0.0364(19) -0.0028(14) -0.0053(15) -0.0004(16)
C35 0.0339(18) 0.0215(16) 0.0324(17) -0.0034(14) -0.0012(15) -0.0012(15)
C36 0.0259(16) 0.0233(16) 0.0283(15) 0.0003(13) 0.0015(13) 0.0035(14)
C37 0.0235(15) 0.0244(15) 0.0259(15) 0.0003(13) 0.0020(12) 0.0002(14)
C38 0.040(2) 0.0250(16) 0.0337(17) 0.0009(13) -0.0051(15) -0.0021(16)
C39 0.044(2) 0.0319(18) 0.0277(16) 0.0065(14) -0.0055(15) 0.0027(17)
C40 0.0266(17) 0.0339(17) 0.0240(15) -0.0076(13) 0.0020(12) -0.0007(15)
C41 0.0357(18) 0.0241(16) 0.0261(15) -0.0020(12) 0.0017(14) -0.0043(16)
C42 0.0307(17) 0.0252(16) 0.0255(15) 0.0000(12) -0.0008(13) -0.0007(15)
C43 0.042(2) 0.043(2) 0.038(2) -0.0031(17) -0.0033(17) 0.0069(19)
C44 0.044(2) 0.042(2) 0.057(3) 0.0042(19) -0.002(2) -0.011(2)
C45 0.048(2) 0.039(2) 0.0289(17) -0.0038(15) -0.0014(16) 0.0026(19)
C46 0.115(5) 0.096(4) 0.043(3) 0.019(3) 0.011(3) -0.048(4)
C47 0.081(4) 0.076(3) 0.031(2) -0.012(2) -0.005(2) 0.028(3)
C48 0.082(3) 0.073(3) 0.038(2) 0.000(2) -0.008(2) 0.031(3)

_geom_special_details            
;
All esds (except the esd in the dihedral angle between two l.s. planes)
are estimated using the full covariance matrix. The cell esds are taken
into account individually in the estimation of esds in distances, angles
and torsion angles; correlations between esds in cell parameters are only
used when they are defined by crystal symmetry. An approximate (isotropic)
treatment of cell esds is used for estimating esds involving l.s. planes.
;

loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
Si1 O3 1.662(3) . ?
Si1 C20 1.862(5) . ?
Si1 C19 1.867(5) . ?
Si1 C21 1.871(4) . ?
Si2 O6 1.664(3) . ?
Si2 C44 1.853(4) . ?
Si2 C43 1.865(4) . ?
Si2 C45 1.880(4) . ?
O1 C10 1.217(4) . ?
O2 C11 1.334(4) . ?
O2 H2 0.8400 . ?
O3 C16 1.374(4) . ?
O4 C34 1.216(4) . ?
O5 C35 1.344(4) . ?
O5 H5 0.8400 . ?
O6 C40 1.377(4) . ?
N1 C2 1.281(5) . ?
N1 C4 1.433(5) . ?
N2 C26 1.286(4) . ?
N2 C28 1.433(5) . ?
C1 C3 1.508(5) . ?
C1 C2 1.519(5) . ?
C1 C12 1.528(4) . ?
C1 C9 1.560(5) . ?
C2 H2A 0.9500 . ?
C3 C8 1.387(5) . ?
C3 C4 1.392(5) . ?
C4 C5 1.379(5) . ?
C5 C6 1.387(6) . ?
C5 H5A 0.9500 . ?
C6 C7 1.372(6) . ?
C6 H6 0.9500 . ?
C7 C8 1.398(5) . ?
C7 H7 0.9500 . ?
C8 H8 0.9500 . ?
C9 C10 1.507(5) . ?
C9 H9A 0.9900 . ?
C9 H9B 0.9900 . ?
C10 C11 1.478(5) . ?
C11 C12 1.356(5) . ?
C12 C13 1.467(4) . ?
C13 C18 1.404(4) . ?
C13 C14 1.405(4) . ?
C14 C15 1.395(5) . ?
C14 H14 0.9500 . ?
C15 C16 1.393(5) . ?
C15 H15 0.9500 . ?
C16 C17 1.387(5) . ?
C17 C18 1.395(5) . ?
C17 H17 0.9500 . ?
C18 H18 0.9500 . ?
C19 H19A 0.9800 . ?
C19 H19B 0.9800 . ?
C19 H19C 0.9800 . ?
C20 H20A 0.9800 . ?
C20 H20B 0.9800 . ?
C20 H20C 0.9800 . ?
C21 C22 1.530(6) . ?
C21 C23 1.531(6) . ?
C21 C24 1.541(6) . ?
C22 H22A 0.9800 . ?
C22 H22B 0.9800 . ?
C22 H22C 0.9800 . ?
C23 H23A 0.9800 . ?
C23 H23B 0.9800 . ?
C23 H23C 0.9800 . ?
C24 H24A 0.9800 . ?
C24 H24B 0.9800 . ?
C24 H24C 0.9800 . ?
C25 C27 1.512(5) . ?
C25 C26 1.522(5) . ?
C25 C36 1.539(4) . ?
C25 C33 1.554(5) . ?
C26 H26 0.9500 . ?
C27 C32 1.378(5) . ?
C27 C28 1.398(5) . ?
C28 C29 1.368(5) . ?
C29 C30 1.386(6) . ?
C29 H29 0.9500 . ?
C30 C31 1.391(7) . ?
C30 H30 0.9500 . ?
C31 C32 1.387(6) . ?
C31 H31 0.9500 . ?
C32 H32 0.9500 . ?
C33 C34 1.501(5) . ?
C33 H33A 0.9900 . ?
C33 H33B 0.9900 . ?
C34 C35 1.468(5) . ?
C35 C36 1.354(5) . ?
C36 C37 1.467(4) . ?
C37 C42 1.400(4) . ?
C37 C38 1.407(4) . ?
C38 C39 1.375(5) . ?
C38 H38 0.9500 . ?
C39 C40 1.391(5) . ?
C39 H39 0.9500 . ?
C40 C41 1.380(5) . ?
C41 C42 1.390(4) . ?
C41 H41 0.9500 . ?
C42 H42 0.9500 . ?
C43 H43A 0.9800 . ?
C43 H43B 0.9800 . ?
C43 H43C 0.9800 . ?
C44 H44A 0.9800 . ?
C44 H44B 0.9800 . ?
C44 H44C 0.9800 . ?
C45 C48 1.511(6) . ?
C45 C46 1.517(7) . ?
C45 C47 1.531(6) . ?
C46 H46A 0.9800 . ?
C46 H46B 0.9800 . ?
C46 H46C 0.9800 . ?
C47 H47A 0.9800 . ?
C47 H47B 0.9800 . ?
C47 H47C 0.9800 . ?
C48 H48A 0.9800 . ?
C48 H48B 0.9800 . ?
C48 H48C 0.9800 . ?

loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle_publ_flag
O3 Si1 C20 107.5(2) . . ?
O3 Si1 C19 111.12(19) . . ?
C20 Si1 C19 109.6(3) . . ?
O3 Si1 C21 104.77(17) . . ?
C20 Si1 C21 112.6(2) . . ?
C19 Si1 C21 111.1(2) . . ?
O6 Si2 C44 106.62(17) . . ?
O6 Si2 C43 110.08(16) . . ?
C44 Si2 C43 112.6(2) . . ?
O6 Si2 C45 105.47(15) . . ?
C44 Si2 C45 111.84(19) . . ?
C43 Si2 C45 109.97(19) . . ?
C11 O2 H2 109.5 . . ?
C16 O3 Si1 124.0(2) . . ?
C35 O5 H5 109.5 . . ?
C40 O6 Si2 128.7(2) . . ?
C2 N1 C4 106.4(3) . . ?
C26 N2 C28 106.9(3) . . ?
C3 C1 C2 98.7(3) . . ?
C3 C1 C12 118.0(3) . . ?
C2 C1 C12 113.5(3) . . ?
C3 C1 C9 114.0(3) . . ?
C2 C1 C9 108.9(3) . . ?
C12 C1 C9 103.8(3) . . ?
N1 C2 C1 115.8(3) . . ?
N1 C2 H2A 122.1 . . ?
C1 C2 H2A 122.1 . . ?
C8 C3 C4 120.0(3) . . ?
C8 C3 C1 132.0(3) . . ?
C4 C3 C1 108.1(3) . . ?
C5 C4 C3 122.2(3) . . ?
C5 C4 N1 126.8(3) . . ?
C3 C4 N1 111.0(3) . . ?
C4 C5 C6 117.7(4) . . ?
C4 C5 H5A 121.1 . . ?
C6 C5 H5A 121.1 . . ?
C7 C6 C5 120.6(4) . . ?
C7 C6 H6 119.7 . . ?
C5 C6 H6 119.7 . . ?
C6 C7 C8 122.1(4) . . ?
C6 C7 H7 119.0 . . ?
C8 C7 H7 119.0 . . ?
C3 C8 C7 117.4(4) . . ?
C3 C8 H8 121.3 . . ?
C7 C8 H8 121.3 . . ?
C10 C9 C1 104.8(3) . . ?
C10 C9 H9A 110.8 . . ?
C1 C9 H9A 110.8 . . ?
C10 C9 H9B 110.8 . . ?
C1 C9 H9B 110.8 . . ?
H9A C9 H9B 108.9 . . ?
O1 C10 C11 126.0(4) . . ?
O1 C10 C9 126.5(3) . . ?
C11 C10 C9 107.5(3) . . ?
O2 C11 C12 127.1(3) . . ?
O2 C11 C10 121.7(3) . . ?
C12 C11 C10 111.0(3) . . ?
C11 C12 C13 125.6(3) . . ?
C11 C12 C1 110.8(3) . . ?
C13 C12 C1 123.4(3) . . ?
C18 C13 C14 117.7(3) . . ?
C18 C13 C12 121.8(3) . . ?
C14 C13 C12 120.3(3) . . ?
C15 C14 C13 120.8(3) . . ?
C15 C14 H14 119.6 . . ?
C13 C14 H14 119.6 . . ?
C16 C15 C14 120.4(3) . . ?
C16 C15 H15 119.8 . . ?
C14 C15 H15 119.8 . . ?
O3 C16 C17 119.8(3) . . ?
O3 C16 C15 120.5(3) . . ?
C17 C16 C15 119.7(3) . . ?
C16 C17 C18 119.9(3) . . ?
C16 C17 H17 120.1 . . ?
C18 C17 H17 120.1 . . ?
C17 C18 C13 121.4(3) . . ?
C17 C18 H18 119.3 . . ?
C13 C18 H18 119.3 . . ?
Si1 C19 H19A 109.5 . . ?
Si1 C19 H19B 109.5 . . ?
H19A C19 H19B 109.5 . . ?
Si1 C19 H19C 109.5 . . ?
H19A C19 H19C 109.5 . . ?
H19B C19 H19C 109.5 . . ?
Si1 C20 H20A 109.5 . . ?
Si1 C20 H20B 109.5 . . ?
H20A C20 H20B 109.5 . . ?
Si1 C20 H20C 109.5 . . ?
H20A C20 H20C 109.5 . . ?
H20B C20 H20C 109.5 . . ?
C22 C21 C23 109.3(4) . . ?
C22 C21 C24 109.6(4) . . ?
C23 C21 C24 108.5(4) . . ?
C22 C21 Si1 110.8(3) . . ?
C23 C21 Si1 109.5(3) . . ?
C24 C21 Si1 109.1(3) . . ?
C21 C22 H22A 109.5 . . ?
C21 C22 H22B 109.5 . . ?
H22A C22 H22B 109.5 . . ?
C21 C22 H22C 109.5 . . ?
H22A C22 H22C 109.5 . . ?
H22B C22 H22C 109.5 . . ?
C21 C23 H23A 109.5 . . ?
C21 C23 H23B 109.5 . . ?
H23A C23 H23B 109.5 . . ?
C21 C23 H23C 109.5 . . ?
H23A C23 H23C 109.5 . . ?
H23B C23 H23C 109.5 . . ?
C21 C24 H24A 109.5 . . ?
C21 C24 H24B 109.5 . . ?
H24A C24 H24B 109.5 . . ?
C21 C24 H24C 109.5 . . ?
H24A C24 H24C 109.5 . . ?
H24B C24 H24C 109.5 . . ?
C27 C25 C26 98.7(3) . . ?
C27 C25 C36 117.3(3) . . ?
C26 C25 C36 113.4(3) . . ?
C27 C25 C33 114.0(3) . . ?
C26 C25 C33 109.8(3) . . ?
C36 C25 C33 103.8(3) . . ?
N2 C26 C25 115.5(3) . . ?
N2 C26 H26 122.2 . . ?
C25 C26 H26 122.2 . . ?
C32 C27 C28 119.6(3) . . ?
C32 C27 C25 132.2(3) . . ?
C28 C27 C25 108.1(3) . . ?
C29 C28 C27 122.6(4) . . ?
C29 C28 N2 126.7(3) . . ?
C27 C28 N2 110.7(3) . . ?
C28 C29 C30 117.6(4) . . ?
C28 C29 H29 121.2 . . ?
C30 C29 H29 121.2 . . ?
C29 C30 C31 120.5(4) . . ?
C29 C30 H30 119.7 . . ?
C31 C30 H30 119.7 . . ?
C32 C31 C30 121.4(4) . . ?
C32 C31 H31 119.3 . . ?
C30 C31 H31 119.3 . . ?
C27 C32 C31 118.3(4) . . ?
C27 C32 H32 120.9 . . ?
C31 C32 H32 120.9 . . ?
C34 C33 C25 104.6(3) . . ?
C34 C33 H33A 110.8 . . ?
C25 C33 H33A 110.8 . . ?
C34 C33 H33B 110.8 . . ?
C25 C33 H33B 110.8 . . ?
H33A C33 H33B 108.9 . . ?
O4 C34 C35 126.5(3) . . ?
O4 C34 C33 126.1(3) . . ?
C35 C34 C33 107.5(3) . . ?
O5 C35 C36 125.8(3) . . ?
O5 C35 C34 122.4(3) . . ?
C36 C35 C34 111.6(3) . . ?
C35 C36 C37 127.5(3) . . ?
C35 C36 C25 109.8(3) . . ?
C37 C36 C25 122.7(3) . . ?
C42 C37 C38 117.1(3) . . ?
C42 C37 C36 121.5(3) . . ?
C38 C37 C36 121.3(3) . . ?
C39 C38 C37 121.3(3) . . ?
C39 C38 H38 119.3 . . ?
C37 C38 H38 119.3 . . ?
C38 C39 C40 120.4(3) . . ?
C38 C39 H39 119.8 . . ?
C40 C39 H39 119.8 . . ?
O6 C40 C41 122.2(3) . . ?
O6 C40 C39 118.1(3) . . ?
C41 C40 C39 119.6(3) . . ?
C40 C41 C42 119.9(3) . . ?
C40 C41 H41 120.1 . . ?
C42 C41 H41 120.1 . . ?
C41 C42 C37 121.6(3) . . ?
C41 C42 H42 119.2 . . ?
C37 C42 H42 119.2 . . ?
Si2 C43 H43A 109.5 . . ?
Si2 C43 H43B 109.5 . . ?
H43A C43 H43B 109.5 . . ?
Si2 C43 H43C 109.5 . . ?
H43A C43 H43C 109.5 . . ?
H43B C43 H43C 109.5 . . ?
Si2 C44 H44A 109.5 . . ?
Si2 C44 H44B 109.5 . . ?
H44A C44 H44B 109.5 . . ?
Si2 C44 H44C 109.5 . . ?
H44A C44 H44C 109.5 . . ?
H44B C44 H44C 109.5 . . ?
C48 C45 C46 109.6(4) . . ?
C48 C45 C47 108.3(4) . . ?
C46 C45 C47 108.8(4) . . ?
C48 C45 Si2 111.1(3) . . ?
C46 C45 Si2 108.3(3) . . ?
C47 C45 Si2 110.6(3) . . ?
C45 C46 H46A 109.5 . . ?
C45 C46 H46B 109.5 . . ?
H46A C46 H46B 109.5 . . ?
C45 C46 H46C 109.5 . . ?
H46A C46 H46C 109.5 . . ?
H46B C46 H46C 109.5 . . ?
C45 C47 H47A 109.5 . . ?
C45 C47 H47B 109.5 . . ?
H47A C47 H47B 109.5 . . ?
C45 C47 H47C 109.5 . . ?
H47A C47 H47C 109.5 . . ?
H47B C47 H47C 109.5 . . ?
C45 C48 H48A 109.5 . . ?
C45 C48 H48B 109.5 . . ?
H48A C48 H48B 109.5 . . ?
C45 C48 H48C 109.5 . . ?
H48A C48 H48C 109.5 . . ?
H48B C48 H48C 109.5 . . ?

loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
_geom_torsion_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsion_publ_flag
C20 Si1 O3 C16 -35.0(4) . . . . ?
C19 Si1 O3 C16 84.9(4) . . . . ?
C21 Si1 O3 C16 -155.0(3) . . . . ?
C44 Si2 O6 C40 114.4(3) . . . . ?
C43 Si2 O6 C40 -8.0(3) . . . . ?
C45 Si2 O6 C40 -126.6(3) . . . . ?
C4 N1 C2 C1 -2.2(4) . . . . ?
C3 C1 C2 N1 2.6(4) . . . . ?
C12 C1 C2 N1 128.3(3) . . . . ?
C9 C1 C2 N1 -116.5(3) . . . . ?
C2 C1 C3 C8 179.2(3) . . . . ?
C12 C1 C3 C8 56.7(5) . . . . ?
C9 C1 C3 C8 -65.5(5) . . . . ?
C2 C1 C3 C4 -1.9(3) . . . . ?
C12 C1 C3 C4 -124.4(3) . . . . ?
C9 C1 C3 C4 113.4(3) . . . . ?
C8 C3 C4 C5 -0.3(5) . . . . ?
C1 C3 C4 C5 -179.3(3) . . . . ?
C8 C3 C4 N1 180.0(3) . . . . ?
C1 C3 C4 N1 0.9(4) . . . . ?
C2 N1 C4 C5 -179.0(3) . . . . ?
C2 N1 C4 C3 0.7(4) . . . . ?
C3 C4 C5 C6 -0.1(5) . . . . ?
N1 C4 C5 C6 179.6(3) . . . . ?
C4 C5 C6 C7 0.7(6) . . . . ?
C5 C6 C7 C8 -0.9(6) . . . . ?
C4 C3 C8 C7 0.2(5) . . . . ?
C1 C3 C8 C7 178.9(3) . . . . ?
C6 C7 C8 C3 0.4(5) . . . . ?
C3 C1 C9 C10 143.6(3) . . . . ?
C2 C1 C9 C10 -107.4(3) . . . . ?
C12 C1 C9 C10 13.9(4) . . . . ?
C1 C9 C10 O1 166.1(4) . . . . ?
C1 C9 C10 C11 -13.4(4) . . . . ?
O1 C10 C11 O2 3.8(6) . . . . ?
C9 C10 C11 O2 -176.6(3) . . . . ?
O1 C10 C11 C12 -171.8(4) . . . . ?
C9 C10 C11 C12 7.8(4) . . . . ?
O2 C11 C12 C13 1.7(6) . . . . ?
C10 C11 C12 C13 177.0(3) . . . . ?
O2 C11 C12 C1 -173.7(3) . . . . ?
C10 C11 C12 C1 1.7(4) . . . . ?
C3 C1 C12 C11 -137.2(3) . . . . ?
C2 C1 C12 C11 108.2(3) . . . . ?
C9 C1 C12 C11 -9.9(4) . . . . ?
C3 C1 C12 C13 47.4(4) . . . . ?
C2 C1 C12 C13 -67.3(4) . . . . ?
C9 C1 C12 C13 174.6(3) . . . . ?
C11 C12 C13 C18 -152.8(3) . . . . ?
C1 C12 C13 C18 22.0(5) . . . . ?
C11 C12 C13 C14 22.3(5) . . . . ?
C1 C12 C13 C14 -162.9(3) . . . . ?
C18 C13 C14 C15 2.1(5) . . . . ?
C12 C13 C14 C15 -173.2(3) . . . . ?
C13 C14 C15 C16 0.8(5) . . . . ?
Si1 O3 C16 C17 105.8(3) . . . . ?
Si1 O3 C16 C15 -75.2(4) . . . . ?
C14 C15 C16 O3 177.7(3) . . . . ?
C14 C15 C16 C17 -3.3(6) . . . . ?
O3 C16 C17 C18 -178.0(3) . . . . ?
C15 C16 C17 C18 2.9(5) . . . . ?
C16 C17 C18 C13 0.0(5) . . . . ?
C14 C13 C18 C17 -2.5(5) . . . . ?
C12 C13 C18 C17 172.8(3) . . . . ?
O3 Si1 C21 C22 -65.2(4) . . . . ?
C20 Si1 C21 C22 178.2(4) . . . . ?
C19 Si1 C21 C22 54.8(4) . . . . ?
O3 Si1 C21 C23 55.4(4) . . . . ?
C20 Si1 C21 C23 -61.2(4) . . . . ?
C19 Si1 C21 C23 175.4(4) . . . . ?
O3 Si1 C21 C24 174.0(3) . . . . ?
C20 Si1 C21 C24 57.4(4) . . . . ?
C19 Si1 C21 C24 -66.0(4) . . . . ?
C28 N2 C26 C25 2.0(4) . . . . ?
C27 C25 C26 N2 -2.1(4) . . . . ?
C36 C25 C26 N2 -127.0(3) . . . . ?
C33 C25 C26 N2 117.4(3) . . . . ?
C26 C25 C27 C32 -179.2(3) . . . . ?
C36 C25 C27 C32 -57.1(5) . . . . ?
C33 C25 C27 C32 64.5(5) . . . . ?
C26 C25 C27 C28 1.3(3) . . . . ?
C36 C25 C27 C28 123.5(3) . . . . ?
C33 C25 C27 C28 -115.0(3) . . . . ?
C32 C27 C28 C29 1.8(5) . . . . ?
C25 C27 C28 C29 -178.6(3) . . . . ?
C32 C27 C28 N2 -179.9(3) . . . . ?
C25 C27 C28 N2 -0.4(4) . . . . ?
C26 N2 C28 C29 177.2(4) . . . . ?
C26 N2 C28 C27 -1.0(4) . . . . ?
C27 C28 C29 C30 -1.1(5) . . . . ?
N2 C28 C29 C30 -179.1(3) . . . . ?
C28 C29 C30 C31 -0.8(6) . . . . ?
C29 C30 C31 C32 2.1(6) . . . . ?
C28 C27 C32 C31 -0.6(5) . . . . ?
C25 C27 C32 C31 -180.0(3) . . . . ?
C30 C31 C32 C27 -1.3(5) . . . . ?
C27 C25 C33 C34 -144.8(3) . . . . ?
C26 C25 C33 C34 105.5(3) . . . . ?
C36 C25 C33 C34 -16.0(4) . . . . ?
C25 C33 C34 O4 -164.7(4) . . . . ?
C25 C33 C34 C35 15.7(4) . . . . ?
O4 C34 C35 O5 -5.0(6) . . . . ?
C33 C34 C35 O5 174.5(3) . . . . ?
O4 C34 C35 C36 171.2(4) . . . . ?
C33 C34 C35 C36 -9.3(4) . . . . ?
O5 C35 C36 C37 -1.8(6) . . . . ?
C34 C35 C36 C37 -177.9(3) . . . . ?
O5 C35 C36 C25 174.4(3) . . . . ?
C34 C35 C36 C25 -1.6(4) . . . . ?
C27 C25 C36 C35 138.0(3) . . . . ?
C26 C25 C36 C35 -107.8(3) . . . . ?
C33 C25 C36 C35 11.3(4) . . . . ?
C27 C25 C36 C37 -45.5(4) . . . . ?
C26 C25 C36 C37 68.7(4) . . . . ?
C33 C25 C36 C37 -172.2(3) . . . . ?
C35 C36 C37 C42 158.6(3) . . . . ?
C25 C36 C37 C42 -17.2(5) . . . . ?
C35 C36 C37 C38 -19.2(5) . . . . ?
C25 C36 C37 C38 164.9(3) . . . . ?
C42 C37 C38 C39 -1.2(5) . . . . ?
C36 C37 C38 C39 176.8(3) . . . . ?
C37 C38 C39 C40 -0.1(6) . . . . ?
Si2 O6 C40 C41 -52.2(4) . . . . ?
Si2 O6 C40 C39 129.7(3) . . . . ?
C38 C39 C40 O6 179.8(3) . . . . ?
C38 C39 C40 C41 1.7(6) . . . . ?
O6 C40 C41 C42 -180.0(3) . . . . ?
C39 C40 C41 C42 -1.9(5) . . . . ?
C40 C41 C42 C37 0.5(5) . . . . ?
C38 C37 C42 C41 0.9(5) . . . . ?
C36 C37 C42 C41 -177.0(3) . . . . ?
O6 Si2 C45 C48 -58.2(3) . . . . ?
C44 Si2 C45 C48 57.3(4) . . . . ?
C43 Si2 C45 C48 -176.9(3) . . . . ?
O6 Si2 C45 C46 62.3(4) . . . . ?
C44 Si2 C45 C46 177.8(4) . . . . ?
C43 Si2 C45 C46 -56.4(4) . . . . ?
O6 Si2 C45 C47 -178.5(3) . . . . ?
C44 Si2 C45 C47 -63.0(4) . . . . ?
C43 Si2 C45 C47 62.8(4) . . . . ?

_diffrn_measured_fraction_theta_max 0.996
_diffrn_reflns_theta_full        27.47
_diffrn_measured_fraction_theta_full 0.996
_refine_diff_density_max         0.284
_refine_diff_density_min         -0.278
_refine_diff_density_rms         0.059


_database_code_depnum_ccdc_archive 'CCDC 933153'