# Supplementary Material (ESI) for Chemical Communications
# This journal is © The Royal Society of Chemistry 2003

data_global

_journal_coden_Cambridge         182

loop_
_publ_author_name
'J. Stephen Clark'
'James Myatt'
'L. Roberts'
'Nigel Walshe'
'Claire Wilson'

_publ_contact_author_name        'Dr J. Stephen Clark'
_publ_contact_author_address     
;
School of Chemistry
University of Nottingham
University Park
NOTTINGHAM
NG7 2RD
UK
;

_publ_contact_author_email       J.S.CLARK@NOTTINGHAM.AC.UK

_publ_requested_journal          'Chemical Communications'

_publ_section_title              
;
Exploration of the biomimetic synthesis of
indole-diterpene mycotoxins: an unexpected cascade reaction during the
attempted synthesis of emindole SB.
;

data_nsitbo
_database_code_CSD               205222

_audit_creation_method           SHELXL-97
_chemical_name_systematic        
; 
? 
;
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C30 H45 N O Si'
_chemical_formula_weight         463.76

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 0.0016 '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 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Si Si 0.0817 0.0704 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_symmetry_cell_setting           Hexagonal
_symmetry_space_group_name_H-M   'P6(5) 2 2'

loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'x-y, x, z+5/6'
'-y, x-y, z+2/3'
'-x, -y, z+1/2'
'-x+y, -x, z+1/3'
'y, -x+y, z+1/6'
'-y, -x, -z+1/6'
'x-y, -y, -z'
'x, x-y, -z+5/6'
'y, x, -z+2/3'
'-x+y, y, -z+1/2'
'-x, -x+y, -z+1/3'

_cell_length_a                   11.1741(4)
_cell_length_b                   11.1741(4)
_cell_length_c                   75.735(4)
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_volume                     8189.4(6)
_cell_formula_units_Z            12
_cell_measurement_temperature    150(2)
_cell_measurement_reflns_used    5408
_cell_measurement_theta_min      2.35
_cell_measurement_theta_max      26.45

_exptl_crystal_description       'hexagonal prism'
_exptl_crystal_colour            colourless
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.18
_exptl_crystal_density_meas      0
_exptl_crystal_density_diffrn    1.128
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             3048
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_type   none
_exptl_absorpt_correction_T_min  ?
_exptl_absorpt_correction_T_max  ?
_exptl_absorpt_process_details   ?

_exptl_special_details           
; 
? 
;

_diffrn_ambient_temperature      150(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_monochromator  graphite
_diffrn_measurement_device_type  'Bruker SMART1000 CCD area detector'
_diffrn_measurement_method       omega
_diffrn_detector_area_resol_mean ?
_diffrn_standards_number         ?
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%        none
_diffrn_reflns_number            33782
_diffrn_reflns_av_R_equivalents  0.102
_diffrn_reflns_av_sigmaI/netI    0.0653
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_l_min       -45
_diffrn_reflns_limit_l_max       97
_diffrn_reflns_theta_min         2.36
_diffrn_reflns_theta_max         25.00
_reflns_number_total             4803
_reflns_number_gt                3301
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       'Bruker SMART version 5.624 (Bruker, 2001)'
_computing_cell_refinement       'Bruker SAINT version 6.02a (Bruker, 2000)'
_computing_data_reduction        'Bruker SAINT; Bruker SHELXTL (Bruker, 2001)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_molecular_graphics    ?
_computing_publication_material  'SHELXL-97; PLATON (Spek, 2001)'

_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^)+(0.1430P)^2^+11.6227P] where P=(Fo^2^+2Fc^2^)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   'geometrically placed, Me and OH from delta-F'
_refine_ls_hydrogen_treatment    'riding model, Me and OH as rigid rotor'
_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   0.2(4)
#unreliable due to high esd but consistent with well understood synthetic route
_refine_ls_number_reflns         4803
_refine_ls_number_parameters     308
_refine_ls_number_restraints     21
_refine_ls_R_factor_all          0.1238
_refine_ls_R_factor_gt           0.0906
_refine_ls_wR_factor_ref         0.2628
_refine_ls_wR_factor_gt          0.2428
_refine_ls_goodness_of_fit_ref   1.011
_refine_ls_restrained_S_all      1.016
_refine_ls_shift/su_max          0.002
_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
Si Si 0.48202(18) 0.97877(18) 0.05779(2) 0.0519(5) Uani 1 1 d D . .
N N 0.3381(5) 1.0073(5) 0.05750(6) 0.0502(13) Uani 1 1 d . . .
O O -0.3019(5) 0.6222(5) -0.03283(6) 0.0639(13) Uani 1 1 d . . .
H1 H -0.2602 0.6097 -0.0412 0.096 Uiso 1 1 calc R . .
C1 C 0.2108(6) 0.9449(6) 0.04797(7) 0.0440(14) Uani 1 1 d . . .
C2 C 0.1344(5) 0.8186(6) 0.03577(7) 0.0423(14) Uani 1 1 d . . .
C3 C 0.2001(6) 0.7992(6) 0.01924(7) 0.0424(14) Uani 1 1 d . . .
H3A H 0.2679 0.7708 0.0226 0.051 Uiso 1 1 calc R . .
H3B H 0.2500 0.8879 0.0128 0.051 Uiso 1 1 calc R . .
C4 C 0.0900(6) 0.6890(6) 0.00714(7) 0.0412(13) Uani 1 1 d . . .
H4A H 0.0453 0.5990 0.0133 0.049 Uiso 1 1 calc R . .
H4B H 0.1354 0.6797 -0.0036 0.049 Uiso 1 1 calc R . .
C5 C -0.0221(5) 0.7244(5) 0.00159(7) 0.0356(12) Uani 1 1 d . . .
H5 H 0.0318 0.8200 -0.0034 0.043 Uiso 1 1 calc R . .
C6 C -0.1129(5) 0.6373(6) -0.01401(7) 0.0374(12) Uani 1 1 d . . .
C7 C -0.2049(7) 0.7000(7) -0.01908(8) 0.0534(16) Uani 1 1 d . . .
H7 H -0.1430 0.7957 -0.0236 0.064 Uiso 1 1 calc R . .
C8 C -0.2857(6) 0.7098(6) -0.00350(8) 0.0497(16) Uani 1 1 d . . .
H8A H -0.3421 0.7505 -0.0075 0.060 Uiso 1 1 calc R . .
H8B H -0.3493 0.6160 0.0011 0.060 Uiso 1 1 calc R . .
C9 C -0.1895(6) 0.7980(6) 0.01113(7) 0.0417(13) Uani 1 1 d . . .
H9A H -0.2450 0.8009 0.0211 0.050 Uiso 1 1 calc R . .
H9B H -0.1309 0.8936 0.0068 0.050 Uiso 1 1 calc R . .
C10 C -0.0958(5) 0.7413(5) 0.01768(7) 0.0350(12) Uani 1 1 d . . .
C11 C 0.0205(5) 0.8535(6) 0.02914(7) 0.0369(12) Uani 1 1 d . . .
H11 H 0.0720 0.9320 0.0207 0.044 Uiso 1 1 calc R . .
C12 C -0.0117(6) 0.9204(6) 0.04480(7) 0.0443(14) Uani 1 1 d . . .
H12A H -0.0431 0.9846 0.0408 0.053 Uiso 1 1 calc R . .
H12B H -0.0814 0.8503 0.0528 0.053 Uiso 1 1 calc R . .
C13 C 0.1300(6) 0.9964(6) 0.05324(7) 0.0429(14) Uani 1 1 d . . .
C14 C 0.2001(6) 1.0980(6) 0.06621(7) 0.0451(14) Uani 1 1 d . . .
C15 C 0.1666(6) 1.1853(6) 0.07577(7) 0.0447(14) Uani 1 1 d . . .
H15 H 0.0786 1.1781 0.0745 0.054 Uiso 1 1 calc R . .
C16 C 0.2647(6) 1.2820(6) 0.08708(7) 0.0469(14) Uani 1 1 d . . .
H16 H 0.2442 1.3420 0.0936 0.056 Uiso 1 1 calc R . .
C17 C 0.3918(7) 1.2917(6) 0.08886(7) 0.0516(16) Uani 1 1 d . . .
H17 H 0.4578 1.3594 0.0966 0.062 Uiso 1 1 calc R . .
C18 C 0.4273(6) 1.2056(6) 0.07971(8) 0.0501(15) Uani 1 1 d . . .
H18 H 0.5154 1.2133 0.0812 0.060 Uiso 1 1 calc R . .
C19 C 0.3286(6) 1.1072(6) 0.06826(7) 0.0420(13) Uani 1 1 d . . .
C20 C 0.4410(10) 0.8052(8) 0.05015(12) 0.097(3) Uani 1 1 d D . .
H20A H 0.3600 0.7347 0.0565 0.145 Uiso 1 1 calc R . .
H20B H 0.5200 0.7921 0.0524 0.145 Uiso 1 1 calc R . .
H20C H 0.4211 0.7968 0.0375 0.145 Uiso 1 1 calc R . .
C21 C 0.5455(8) 0.9897(9) 0.08055(8) 0.077(2) Uani 1 1 d DU . .
H21A H 0.4718 0.9730 0.0889 0.116 Uiso 1 1 calc R . .
H21B H 0.6251 1.0819 0.0826 0.116 Uiso 1 1 calc R . .
H21C H 0.5732 0.9200 0.0822 0.116 Uiso 1 1 calc R . .
C22 C 0.6152(7) 1.1061(6) 0.04316(7) 0.083(2) Uani 1 1 d DU . .
C23 C 0.7415(7) 1.0779(8) 0.04349(11) 0.080(2) Uani 1 1 d D . .
H23A H 0.7183 0.9956 0.0364 0.120 Uiso 1 1 calc R . .
H23B H 0.7602 1.0631 0.0557 0.120 Uiso 1 1 calc R . .
H23C H 0.8236 1.1578 0.0385 0.120 Uiso 1 1 calc R . .
C24 C 0.5631(9) 1.0899(11) 0.02355(9) 0.110(4) Uani 1 1 d D . .
H24A H 0.4939 1.1190 0.0227 0.165 Uiso 1 1 calc R . .
H24B H 0.5217 0.9930 0.0200 0.165 Uiso 1 1 calc R . .
H24C H 0.6413 1.1476 0.0158 0.165 Uiso 1 1 calc R . .
C25 C 0.6750(9) 1.2606(7) 0.04903(12) 0.098(3) Uani 1 1 d D . .
H25A H 0.7593 1.3199 0.0423 0.147 Uiso 1 1 calc R . .
H25B H 0.6967 1.2693 0.0617 0.147 Uiso 1 1 calc R . .
H25C H 0.6064 1.2890 0.0468 0.147 Uiso 1 1 calc R . .
C26 C 0.0800(7) 0.6926(7) 0.04850(8) 0.0540(16) Uani 1 1 d . . .
H26A H 0.0507 0.6081 0.0416 0.081 Uiso 1 1 calc R . .
H26B H 0.0013 0.6844 0.0552 0.081 Uiso 1 1 calc R . .
H26C H 0.1538 0.7061 0.0567 0.081 Uiso 1 1 calc R . .
C27 C -0.0209(7) 0.6604(7) -0.02983(8) 0.0534(16) Uani 1 1 d . . .
H27 H 0.0474 0.7538 -0.0320 0.064 Uiso 1 1 calc R . .
C28 C -0.0220(7) 0.5701(8) -0.04094(8) 0.0630(19) Uani 1 1 d . . .
H28A H -0.0875 0.4747 -0.0396 0.076 Uiso 1 1 calc R . .
H28B H 0.0427 0.5999 -0.0504 0.076 Uiso 1 1 calc R . .
C29 C -0.2018(6) 0.4812(6) -0.00978(8) 0.0461(14) Uani 1 1 d . . .
H29A H -0.2529 0.4314 -0.0204 0.069 Uiso 1 1 calc R . .
H29B H -0.2672 0.4677 -0.0003 0.069 Uiso 1 1 calc R . .
H29C H -0.1416 0.4456 -0.0060 0.069 Uiso 1 1 calc R . .
C30 C -0.1870(6) 0.6082(6) 0.02823(7) 0.0460(14) Uani 1 1 d . . .
H30A H -0.2789 0.5581 0.0228 0.069 Uiso 1 1 calc R . .
H30B H -0.1955 0.6322 0.0404 0.069 Uiso 1 1 calc R . .
H30C H -0.1447 0.5498 0.0281 0.069 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
Si 0.0497(10) 0.0486(10) 0.0612(10) -0.0112(8) -0.0102(8) 0.0275(9)
N 0.043(3) 0.052(3) 0.063(3) -0.032(3) -0.017(2) 0.029(3)
O 0.056(3) 0.075(3) 0.069(3) -0.027(3) -0.030(2) 0.039(3)
C1 0.038(3) 0.045(3) 0.051(3) -0.017(3) -0.009(3) 0.022(3)
C2 0.027(3) 0.048(3) 0.058(3) -0.023(3) -0.011(2) 0.024(3)
C3 0.027(3) 0.046(3) 0.052(3) -0.025(3) -0.012(2) 0.017(3)
C4 0.033(3) 0.039(3) 0.055(3) -0.017(3) -0.009(3) 0.021(3)
C5 0.028(3) 0.027(3) 0.048(3) -0.006(2) -0.003(2) 0.011(2)
C6 0.027(3) 0.039(3) 0.047(3) -0.006(2) 0.000(2) 0.016(2)
C7 0.056(4) 0.059(4) 0.054(3) -0.013(3) -0.018(3) 0.036(4)
C8 0.037(3) 0.051(4) 0.066(4) -0.020(3) -0.022(3) 0.026(3)
C9 0.029(3) 0.040(3) 0.061(3) -0.005(3) -0.005(3) 0.020(3)
C10 0.025(3) 0.034(3) 0.050(3) -0.011(2) -0.009(2) 0.018(2)
C11 0.029(3) 0.034(3) 0.050(3) -0.009(2) -0.001(2) 0.018(2)
C12 0.036(3) 0.047(3) 0.049(3) -0.011(3) 0.001(3) 0.021(3)
C13 0.035(3) 0.046(4) 0.052(3) -0.015(3) -0.006(3) 0.022(3)
C14 0.043(3) 0.038(3) 0.051(3) -0.017(3) -0.002(3) 0.017(3)
C15 0.044(3) 0.043(3) 0.054(3) -0.014(3) 0.000(3) 0.026(3)
C16 0.053(4) 0.037(3) 0.047(3) -0.012(3) -0.001(3) 0.020(3)
C17 0.065(4) 0.042(3) 0.039(3) -0.019(3) -0.003(3) 0.019(3)
C18 0.033(3) 0.049(4) 0.063(4) -0.011(3) -0.002(3) 0.016(3)
C19 0.041(3) 0.048(3) 0.042(3) -0.019(3) -0.006(3) 0.026(3)
C20 0.126(8) 0.078(6) 0.130(7) -0.059(5) -0.073(6) 0.084(6)
C21 0.071(4) 0.090(5) 0.088(5) 0.005(4) -0.003(4) 0.053(4)
C22 0.126(6) 0.053(4) 0.049(3) -0.005(3) -0.009(4) 0.028(4)
C23 0.042(4) 0.078(5) 0.122(6) -0.018(5) 0.002(4) 0.032(4)
C24 0.071(6) 0.162(10) 0.062(5) 0.020(6) 0.017(4) 0.032(7)
C25 0.079(6) 0.059(5) 0.133(7) 0.024(5) 0.034(6) 0.016(5)
C26 0.061(4) 0.057(4) 0.057(4) -0.012(3) -0.016(3) 0.039(4)
C27 0.048(4) 0.056(4) 0.054(3) -0.016(3) -0.016(3) 0.024(3)
C28 0.057(4) 0.066(4) 0.056(4) -0.024(3) 0.002(3) 0.024(4)
C29 0.032(3) 0.048(4) 0.053(3) -0.019(3) -0.012(3) 0.016(3)
C30 0.041(3) 0.034(3) 0.053(3) 0.001(3) 0.006(3) 0.012(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
Si N 1.789(5) . ?
Si C22 1.830(6) . ?
Si C21 1.844(6) . ?
Si C20 1.849(6) . ?
N C1 1.428(7) . ?
N C19 1.428(7) . ?
O C7 1.439(7) . ?
C1 C13 1.351(8) . ?
C1 C2 1.539(7) . ?
C2 C3 1.521(7) . ?
C2 C26 1.557(9) . ?
C2 C11 1.588(7) . ?
C3 C4 1.534(7) . ?
C4 C5 1.549(7) . ?
C5 C10 1.534(7) . ?
C5 C6 1.544(7) . ?
C6 C27 1.515(8) . ?
C6 C29 1.549(8) . ?
C6 C7 1.555(8) . ?
C7 C8 1.523(9) . ?
C8 C9 1.514(8) . ?
C9 C10 1.552(7) . ?
C10 C30 1.540(8) . ?
C10 C11 1.544(7) . ?
C11 C12 1.537(7) . ?
C12 C13 1.513(8) . ?
C13 C14 1.406(7) . ?
C14 C19 1.396(8) . ?
C14 C15 1.408(8) . ?
C15 C16 1.385(8) . ?
C16 C17 1.376(9) . ?
C17 C18 1.395(8) . ?
C18 C19 1.401(8) . ?
C22 C25 1.572(7) . ?
C22 C24 1.572(7) . ?
C22 C23 1.593(7) . ?
C27 C28 1.309(9) . ?

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
N Si C22 107.9(3) . . ?
N Si C21 110.5(3) . . ?
C22 Si C21 112.2(3) . . ?
N Si C20 114.2(3) . . ?
C22 Si C20 107.8(4) . . ?
C21 Si C20 104.3(4) . . ?
C1 N C19 103.0(4) . . ?
C1 N Si 133.1(4) . . ?
C19 N Si 123.9(4) . . ?
C13 C1 N 110.9(5) . . ?
C13 C1 C2 112.7(5) . . ?
N C1 C2 135.4(5) . . ?
C3 C2 C1 122.6(5) . . ?
C3 C2 C26 112.2(5) . . ?
C1 C2 C26 104.1(5) . . ?
C3 C2 C11 106.2(4) . . ?
C1 C2 C11 96.3(4) . . ?
C26 C2 C11 114.8(5) . . ?
C2 C3 C4 110.9(5) . . ?
C3 C4 C5 112.6(4) . . ?
C10 C5 C6 117.5(4) . . ?
C10 C5 C4 111.6(4) . . ?
C6 C5 C4 114.0(4) . . ?
C27 C6 C5 108.8(4) . . ?
C27 C6 C29 110.7(5) . . ?
C5 C6 C29 113.7(4) . . ?
C27 C6 C7 105.8(5) . . ?
C5 C6 C7 106.2(4) . . ?
C29 C6 C7 111.2(5) . . ?
O C7 C8 108.0(5) . . ?
O C7 C6 112.0(5) . . ?
C8 C7 C6 113.0(5) . . ?
C9 C8 C7 111.1(5) . . ?
C8 C9 C10 111.9(4) . . ?
C5 C10 C30 115.5(4) . . ?
C5 C10 C11 105.1(4) . . ?
C30 C10 C11 112.0(4) . . ?
C5 C10 C9 108.0(4) . . ?
C30 C10 C9 107.7(4) . . ?
C11 C10 C9 108.3(4) . . ?
C12 C11 C10 121.5(4) . . ?
C12 C11 C2 106.6(4) . . ?
C10 C11 C2 115.5(4) . . ?
C13 C12 C11 99.5(4) . . ?
C1 C13 C14 109.2(5) . . ?
C1 C13 C12 111.8(5) . . ?
C14 C13 C12 138.7(5) . . ?
C19 C14 C13 105.9(5) . . ?
C19 C14 C15 120.8(5) . . ?
C13 C14 C15 133.3(6) . . ?
C16 C15 C14 118.5(6) . . ?
C17 C16 C15 120.4(5) . . ?
C16 C17 C18 122.4(5) . . ?
C17 C18 C19 117.7(5) . . ?
C14 C19 C18 120.3(5) . . ?
C14 C19 N 110.8(5) . . ?
C18 C19 N 128.9(5) . . ?
C25 C22 C24 108.9(6) . . ?
C25 C22 C23 106.3(6) . . ?
C24 C22 C23 107.8(6) . . ?
C25 C22 Si 114.6(5) . . ?
C24 C22 Si 111.8(5) . . ?
C23 C22 Si 107.0(5) . . ?
C28 C27 C6 129.3(6) . . ?

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
C22 Si N C1 97.3(6) . . . . ?
C21 Si N C1 -139.7(6) . . . . ?
C20 Si N C1 -22.5(7) . . . . ?
C22 Si N C19 -83.9(5) . . . . ?
C21 Si N C19 39.2(6) . . . . ?
C20 Si N C19 156.4(6) . . . . ?
C19 N C1 C13 -3.3(7) . . . . ?
Si N C1 C13 175.7(5) . . . . ?
C19 N C1 C2 -170.5(7) . . . . ?
Si N C1 C2 8.6(11) . . . . ?
C13 C1 C2 C3 137.1(6) . . . . ?
N C1 C2 C3 -55.9(10) . . . . ?
C13 C1 C2 C26 -94.2(6) . . . . ?
N C1 C2 C26 72.8(8) . . . . ?
C13 C1 C2 C11 23.3(6) . . . . ?
N C1 C2 C11 -169.7(7) . . . . ?
C1 C2 C3 C4 -164.1(5) . . . . ?
C26 C2 C3 C4 70.8(6) . . . . ?
C11 C2 C3 C4 -55.3(6) . . . . ?
C2 C3 C4 C5 57.8(7) . . . . ?
C3 C4 C5 C10 -58.4(6) . . . . ?
C3 C4 C5 C6 165.6(5) . . . . ?
C10 C5 C6 C27 167.2(5) . . . . ?
C4 C5 C6 C27 -59.5(6) . . . . ?
C10 C5 C6 C29 -68.9(6) . . . . ?
C4 C5 C6 C29 64.4(6) . . . . ?
C10 C5 C6 C7 53.7(6) . . . . ?
C4 C5 C6 C7 -173.0(5) . . . . ?
C27 C6 C7 O 68.3(6) . . . . ?
C5 C6 C7 O -176.2(5) . . . . ?
C29 C6 C7 O -52.0(7) . . . . ?
C27 C6 C7 C8 -169.4(5) . . . . ?
C5 C6 C7 C8 -53.9(6) . . . . ?
C29 C6 C7 C8 70.3(6) . . . . ?
O C7 C8 C9 -176.5(5) . . . . ?
C6 C7 C8 C9 59.0(7) . . . . ?
C7 C8 C9 C10 -57.8(7) . . . . ?
C6 C5 C10 C30 66.5(6) . . . . ?
C4 C5 C10 C30 -67.9(6) . . . . ?
C6 C5 C10 C11 -169.6(4) . . . . ?
C4 C5 C10 C11 56.1(5) . . . . ?
C6 C5 C10 C9 -54.1(6) . . . . ?
C4 C5 C10 C9 171.6(4) . . . . ?
C8 C9 C10 C5 53.4(6) . . . . ?
C8 C9 C10 C30 -72.0(6) . . . . ?
C8 C9 C10 C11 166.7(5) . . . . ?
C5 C10 C11 C12 168.4(5) . . . . ?
C30 C10 C11 C12 -65.5(7) . . . . ?
C9 C10 C11 C12 53.2(7) . . . . ?
C5 C10 C11 C2 -59.9(6) . . . . ?
C30 C10 C11 C2 66.2(6) . . . . ?
C9 C10 C11 C2 -175.2(5) . . . . ?
C3 C2 C11 C12 -161.3(5) . . . . ?
C1 C2 C11 C12 -34.7(5) . . . . ?
C26 C2 C11 C12 74.1(6) . . . . ?
C3 C2 C11 C10 60.4(6) . . . . ?
C1 C2 C11 C10 -173.0(5) . . . . ?
C26 C2 C11 C10 -64.2(6) . . . . ?
C10 C11 C12 C13 169.1(5) . . . . ?
C2 C11 C12 C13 33.8(6) . . . . ?
N C1 C13 C14 1.4(7) . . . . ?
C2 C1 C13 C14 171.7(5) . . . . ?
N C1 C13 C12 -173.6(5) . . . . ?
C2 C1 C13 C12 -3.3(7) . . . . ?
C11 C12 C13 C1 -19.2(7) . . . . ?
C11 C12 C13 C14 167.8(7) . . . . ?
C1 C13 C14 C19 1.1(7) . . . . ?
C12 C13 C14 C19 174.2(7) . . . . ?
C1 C13 C14 C15 178.4(7) . . . . ?
C12 C13 C14 C15 -8.5(13) . . . . ?
C19 C14 C15 C16 0.9(9) . . . . ?
C13 C14 C15 C16 -176.0(6) . . . . ?
C14 C15 C16 C17 -0.1(9) . . . . ?
C15 C16 C17 C18 -0.6(9) . . . . ?
C16 C17 C18 C19 0.5(9) . . . . ?
C13 C14 C19 C18 176.6(5) . . . . ?
C15 C14 C19 C18 -1.1(10) . . . . ?
C13 C14 C19 N -3.3(7) . . . . ?
C15 C14 C19 N 179.0(5) . . . . ?
C17 C18 C19 C14 0.3(9) . . . . ?
C17 C18 C19 N -179.7(6) . . . . ?
C1 N C19 C14 4.0(7) . . . . ?
Si N C19 C14 -175.2(5) . . . . ?
C1 N C19 C18 -175.9(6) . . . . ?
Si N C19 C18 4.9(9) . . . . ?
N Si C22 C25 62.9(6) . . . . ?
C21 Si C22 C25 -59.0(6) . . . . ?
C20 Si C22 C25 -173.3(5) . . . . ?
N Si C22 C24 -61.7(6) . . . . ?
C21 Si C22 C24 176.4(5) . . . . ?
C20 Si C22 C24 62.1(6) . . . . ?
N Si C22 C23 -179.5(4) . . . . ?
C21 Si C22 C23 58.6(5) . . . . ?
C20 Si C22 C23 -55.7(5) . . . . ?
C5 C6 C27 C28 135.7(7) . . . . ?
C29 C6 C27 C28 10.1(9) . . . . ?
C7 C6 C27 C28 -110.6(7) . . . . ?

_diffrn_measured_fraction_theta_max 0.998
_diffrn_reflns_theta_full        25.00
_diffrn_measured_fraction_theta_full 0.998
_refine_diff_density_max         1.022
_refine_diff_density_min         -0.628
_refine_diff_density_rms         0.062