# Supplementary Information (SI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2026

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
# Full information about CCDC data access policies and citation 
# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
# this file and to allow appropriate attribution of the data. 
# 
#######################################################################

data_t
_database_code_depnum_ccdc_archive 'CCDC 2492180'
loop_
_audit_author_name
_audit_author_address
'Shen Gao'
;Shanghai Jiaotong
China
;
_audit_update_record             
;
2025-09-29 deposited with the CCDC.	2026-05-06 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2018/3
_shelx_SHELXL_version_number     2018/3
_chemical_name_systematic        ?
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         'C29 H28 N2 O Si'
_chemical_formula_sum            'C29 H28 N2 O Si'
_chemical_formula_weight         448.62

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0181 0.0091 '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 0.0311 0.0180 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0492 0.0322 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Si Si 0.2541 0.3302 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_H-M_alt        'P 21 21 21'
_space_group_name_Hall           'P 2ac 2ab'

_shelx_space_group_comment       
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;

loop_
_space_group_symop_operation_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                   11.12920(10)
_cell_length_b                   12.8003(2)
_cell_length_c                   16.8233(2)
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_volume                     2396.60(5)
_cell_formula_units_Z            4
_cell_measurement_temperature    100(2)
_cell_measurement_reflns_used    15625
_cell_measurement_theta_min      4.2850
_cell_measurement_theta_max      75.9740

_exptl_crystal_description       block
_exptl_crystal_colour            colourless
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.243
_exptl_crystal_F_000             952
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.180
_exptl_crystal_size_mid          0.160
_exptl_crystal_size_min          0.140
_exptl_absorpt_coefficient_mu    1.042
_shelx_estimated_absorpt_T_min   0.835
_shelx_estimated_absorpt_T_max   0.868
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  0.83897
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_process_details   
;
CrysAlisPro 1.171.43.112a (Rigaku Oxford Diffraction, 2024)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_absorpt_special_details   ?
_diffrn_ambient_temperature      100(2)
_diffrn_radiation_wavelength     1.54184
_diffrn_radiation_type           CuK\a
_diffrn_source                   ?
_diffrn_measurement_device_type  'ROD, Synergy Custom DW system, HyPix-Arc 150'
_diffrn_measurement_method       ?
_diffrn_detector_area_resol_mean ?
_diffrn_reflns_number            29026
_diffrn_reflns_av_unetI/netI     0.0212
_diffrn_reflns_av_R_equivalents  0.0269
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_theta_min         4.340
_diffrn_reflns_theta_max         76.348
_diffrn_reflns_theta_full        67.684
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measured_fraction_theta_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_point_group_measured_fraction_full 0.997
_reflns_number_total             4951
_reflns_number_gt                4737
_reflns_threshold_expression     'I > 2σ(I)'
_reflns_Friedel_coverage         0.758
_reflns_Friedel_fraction_max     0.979
_reflns_Friedel_fraction_full    0.997

_reflns_special_details          
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences.
;

_computing_data_collection       ?
_computing_cell_refinement       ?
_computing_data_reduction        ?
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_molecular_graphics    ?
_computing_publication_material  ?
_refine_special_details          ?
_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'w=1/[σ²(Fo²)+(0.0373P)²+0.4477P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary   ?
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_extinction_coef       0.00080(18)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_abs_structure_details 
;
 Flack x determined using 1984 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.003(7)
_chemical_absolute_configuration ad
_refine_ls_number_reflns         4951
_refine_ls_number_parameters     303
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0294
_refine_ls_R_factor_gt           0.0273
_refine_ls_wR_factor_ref         0.0696
_refine_ls_wR_factor_gt          0.0687
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_restrained_S_all      1.036
_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_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
Si1 Si 0.97155(4) 0.46612(4) 0.27992(3) 0.02053(12) Uani 1 1 d . . . . .
O1 O 0.44546(11) 0.37872(11) 0.39172(8) 0.0223(3) Uani 1 1 d . . . . .
N1 N 0.72540(13) 0.30074(12) 0.30887(9) 0.0197(3) Uani 1 1 d . . . . .
C11 C 0.72157(15) 0.34728(13) 0.23954(10) 0.0171(4) Uani 1 1 d . . . . .
C18 C 0.54019(16) 0.37062(14) 0.34214(10) 0.0185(3) Uani 1 1 d . . . . .
C19 C 0.44993(17) 0.32234(15) 0.46721(11) 0.0247(4) Uani 1 1 d . . . . .
H19 H 0.491980 0.254077 0.459380 0.030 Uiso 1 1 calc R U . . .
C20 C 0.31957(19) 0.3025(2) 0.48872(15) 0.0382(5) Uani 1 1 d . . . . .
H20A H 0.275750 0.368924 0.489292 0.057 Uiso 1 1 calc R U . . .
H20B H 0.315275 0.270163 0.541432 0.057 Uiso 1 1 calc R U . . .
H20C H 0.283462 0.255672 0.449321 0.057 Uiso 1 1 calc R U . . .
C21 C 0.5177(2) 0.38690(17) 0.52754(12) 0.0321(5) Uani 1 1 d . . . . .
H21A H 0.598564 0.401744 0.507487 0.048 Uiso 1 1 calc R U . . .
H21B H 0.523497 0.348099 0.577608 0.048 Uiso 1 1 calc R U . . .
H21C H 0.474905 0.452742 0.536664 0.048 Uiso 1 1 calc R U . . .
C22 C 1.0174(2) 0.38950(18) 0.36886(12) 0.0341(5) Uani 1 1 d . . . . .
H22A H 1.040041 0.437387 0.411783 0.051 Uiso 1 1 calc R U . . .
H22B H 1.086167 0.345087 0.355341 0.051 Uiso 1 1 calc R U . . .
H22C H 0.950212 0.345675 0.386321 0.051 Uiso 1 1 calc R U . . .
C12 C 0.62455(15) 0.41425(13) 0.21520(11) 0.0174(3) Uani 1 1 d . . . . .
C1 C 0.82487(16) 0.32474(14) 0.18537(11) 0.0184(4) Uani 1 1 d . . . . .
N2 N 0.63164(13) 0.31267(12) 0.36221(9) 0.0198(3) Uani 1 1 d . . . . .
C16 C 0.43310(16) 0.49419(14) 0.25071(12) 0.0213(4) Uani 1 1 d . . . . .
H16 H 0.369051 0.503118 0.287413 0.026 Uiso 1 1 calc R U . . .
C17 C 0.52969(16) 0.42745(13) 0.26911(10) 0.0182(3) Uani 1 1 d . . . . .
C5 C 0.90395(18) 0.22201(15) 0.07396(11) 0.0237(4) Uani 1 1 d . . . . .
C13 C 0.62116(16) 0.46769(15) 0.14180(10) 0.0203(3) Uani 1 1 d . . . . .
H13 H 0.684238 0.458821 0.104360 0.024 Uiso 1 1 calc R U . . .
C24 C 0.84202(16) 0.55376(15) 0.30444(12) 0.0234(4) Uani 1 1 d . . . . .
C9 C 0.69555(17) 0.19569(15) 0.11410(11) 0.0236(4) Uani 1 1 d . . . . .
H9 H 0.629460 0.212024 0.147604 0.028 Uiso 1 1 calc R U . . .
C4 C 1.01638(19) 0.26970(15) 0.08671(12) 0.0272(4) Uani 1 1 d . . . . .
H4 H 1.082664 0.251245 0.054016 0.033 Uiso 1 1 calc R U . . .
C10 C 0.80593(17) 0.24944(14) 0.12417(11) 0.0200(4) Uani 1 1 d . . . . .
C14 C 0.52635(17) 0.53247(15) 0.12479(11) 0.0232(4) Uani 1 1 d . . . . .
H14 H 0.524430 0.568478 0.075431 0.028 Uiso 1 1 calc R U . . .
C2 C 0.93553(16) 0.37194(14) 0.19705(11) 0.0197(4) Uani 1 1 d . . . . .
C15 C 0.43205(16) 0.54633(15) 0.17933(11) 0.0232(4) Uani 1 1 d . . . . .
H15 H 0.367384 0.591893 0.166807 0.028 Uiso 1 1 calc R U . . .
C3 C 1.03124(18) 0.34197(14) 0.14537(12) 0.0246(4) Uani 1 1 d . . . . .
H3 H 1.107864 0.373467 0.152093 0.030 Uiso 1 1 calc R U . . .
C8 C 0.6829(2) 0.12052(16) 0.05671(12) 0.0302(5) Uani 1 1 d . . . . .
H8 H 0.608663 0.084534 0.051391 0.036 Uiso 1 1 calc R U . . .
C23 C 1.09919(17) 0.54914(18) 0.24597(13) 0.0310(5) Uani 1 1 d . . . . .
H23A H 1.074583 0.589459 0.199207 0.047 Uiso 1 1 calc R U . . .
H23B H 1.167652 0.504552 0.232143 0.047 Uiso 1 1 calc R U . . .
H23C H 1.122451 0.597055 0.288722 0.047 Uiso 1 1 calc R U . . .
C25 C 0.78307(18) 0.55063(17) 0.37798(13) 0.0304(5) Uani 1 1 d . . . . .
H25 H 0.806151 0.499976 0.416324 0.036 Uiso 1 1 calc R U . . .
C26 C 0.6910(2) 0.6208(2) 0.39574(15) 0.0397(6) Uani 1 1 d . . . . .
H26 H 0.652073 0.617610 0.445937 0.048 Uiso 1 1 calc R U . . .
C6 C 0.8867(2) 0.14527(16) 0.01426(12) 0.0306(5) Uani 1 1 d . . . . .
H6 H 0.951273 0.127875 -0.020195 0.037 Uiso 1 1 calc R U . . .
C7 C 0.7792(2) 0.09618(17) 0.00553(13) 0.0337(5) Uani 1 1 d . . . . .
H7 H 0.768909 0.045434 -0.035116 0.040 Uiso 1 1 calc R U . . .
C28 C 0.71210(19) 0.69927(18) 0.26742(15) 0.0367(5) Uani 1 1 d . . . . .
H28 H 0.687819 0.749667 0.229209 0.044 Uiso 1 1 calc R U . . .
C29 C 0.80408(18) 0.62955(16) 0.25010(13) 0.0286(4) Uani 1 1 d . . . . .
H29 H 0.842438 0.633488 0.199741 0.034 Uiso 1 1 calc R U . . .
C27 C 0.65622(19) 0.6947(2) 0.34064(16) 0.0407(6) Uani 1 1 d . . . . .
H27 H 0.593752 0.742593 0.353099 0.049 Uiso 1 1 calc R U . . .


_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 C22 1.860(2) . ?
Si1 C23 1.864(2) . ?
Si1 C24 1.873(2) . ?
Si1 C2 1.8862(19) . ?
O1 C18 1.348(2) . ?
O1 C19 1.461(2) . ?
N1 C11 1.310(2) . ?
N1 N2 1.385(2) . ?
C11 C12 1.438(2) . ?
C11 C1 1.495(2) . ?
C18 N2 1.304(2) . ?
C18 C17 1.433(2) . ?
C19 C21 1.510(3) . ?
C19 C20 1.517(3) . ?
C12 C17 1.402(2) . ?
C12 C13 1.412(2) . ?
C1 C2 1.386(3) . ?
C1 C10 1.426(3) . ?
C16 C15 1.374(3) . ?
C16 C17 1.408(2) . ?
C5 C4 1.409(3) . ?
C5 C6 1.418(3) . ?
C5 C10 1.424(3) . ?
C13 C14 1.372(3) . ?
C24 C29 1.398(3) . ?
C24 C25 1.401(3) . ?
C9 C8 1.370(3) . ?
C9 C10 1.418(3) . ?
C4 C3 1.363(3) . ?
C14 C15 1.405(3) . ?
C2 C3 1.428(2) . ?
C8 C7 1.409(3) . ?
C25 C26 1.395(3) . ?
C26 C27 1.381(4) . ?
C6 C7 1.359(3) . ?
C28 C27 1.381(4) . ?
C28 C29 1.389(3) . ?

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
C22 Si1 C23 109.75(10) . . ?
C22 Si1 C24 110.48(10) . . ?
C23 Si1 C24 108.22(10) . . ?
C22 Si1 C2 108.41(9) . . ?
C23 Si1 C2 107.45(9) . . ?
C24 Si1 C2 112.46(8) . . ?
C18 O1 C19 118.23(14) . . ?
C11 N1 N2 120.14(15) . . ?
N1 C11 C12 123.29(16) . . ?
N1 C11 C1 115.45(15) . . ?
C12 C11 C1 121.25(15) . . ?
N2 C18 O1 119.60(16) . . ?
N2 C18 C17 125.07(16) . . ?
O1 C18 C17 115.33(15) . . ?
O1 C19 C21 109.32(16) . . ?
O1 C19 C20 104.91(15) . . ?
C21 C19 C20 114.12(18) . . ?
C17 C12 C13 119.15(16) . . ?
C17 C12 C11 116.94(16) . . ?
C13 C12 C11 123.90(16) . . ?
C2 C1 C10 121.90(16) . . ?
C2 C1 C11 120.85(16) . . ?
C10 C1 C11 117.19(16) . . ?
C18 N2 N1 118.89(15) . . ?
C15 C16 C17 119.57(17) . . ?
C12 C17 C16 120.40(16) . . ?
C12 C17 C18 115.61(15) . . ?
C16 C17 C18 123.99(17) . . ?
C4 C5 C6 121.91(18) . . ?
C4 C5 C10 118.91(17) . . ?
C6 C5 C10 119.16(19) . . ?
C14 C13 C12 119.71(16) . . ?
C29 C24 C25 117.12(19) . . ?
C29 C24 Si1 120.27(15) . . ?
C25 C24 Si1 122.54(16) . . ?
C8 C9 C10 120.93(19) . . ?
C3 C4 C5 120.81(17) . . ?
C9 C10 C5 118.24(17) . . ?
C9 C10 C1 122.83(17) . . ?
C5 C10 C1 118.81(17) . . ?
C13 C14 C15 120.96(17) . . ?
C1 C2 C3 117.36(17) . . ?
C1 C2 Si1 124.92(14) . . ?
C3 C2 Si1 117.60(14) . . ?
C16 C15 C14 120.20(17) . . ?
C4 C3 C2 122.20(18) . . ?
C9 C8 C7 120.5(2) . . ?
C26 C25 C24 121.0(2) . . ?
C27 C26 C25 120.2(2) . . ?
C7 C6 C5 121.1(2) . . ?
C6 C7 C8 120.1(2) . . ?
C27 C28 C29 119.5(2) . . ?
C28 C29 C24 122.1(2) . . ?
C26 C27 C28 120.1(2) . . ?

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
N2 N1 C11 C12 1.7(3) . . . . ?
N2 N1 C11 C1 -177.20(15) . . . . ?
C19 O1 C18 N2 0.6(2) . . . . ?
C19 O1 C18 C17 179.75(15) . . . . ?
C18 O1 C19 C21 83.9(2) . . . . ?
C18 O1 C19 C20 -153.35(17) . . . . ?
N1 C11 C12 C17 -1.1(3) . . . . ?
C1 C11 C12 C17 177.69(16) . . . . ?
N1 C11 C12 C13 177.78(17) . . . . ?
C1 C11 C12 C13 -3.4(3) . . . . ?
N1 C11 C1 C2 -76.8(2) . . . . ?
C12 C11 C1 C2 104.3(2) . . . . ?
N1 C11 C1 C10 100.31(19) . . . . ?
C12 C11 C1 C10 -78.6(2) . . . . ?
O1 C18 N2 N1 176.63(15) . . . . ?
C17 C18 N2 N1 -2.4(3) . . . . ?
C11 N1 N2 C18 0.1(2) . . . . ?
C13 C12 C17 C16 -0.8(3) . . . . ?
C11 C12 C17 C16 178.11(16) . . . . ?
C13 C12 C17 C18 -179.93(15) . . . . ?
C11 C12 C17 C18 -1.0(2) . . . . ?
C15 C16 C17 C12 0.2(3) . . . . ?
C15 C16 C17 C18 179.18(17) . . . . ?
N2 C18 C17 C12 2.8(3) . . . . ?
O1 C18 C17 C12 -176.24(15) . . . . ?
N2 C18 C17 C16 -176.25(17) . . . . ?
O1 C18 C17 C16 4.7(2) . . . . ?
C17 C12 C13 C14 0.8(3) . . . . ?
C11 C12 C13 C14 -178.02(17) . . . . ?
C22 Si1 C24 C29 170.53(15) . . . . ?
C23 Si1 C24 C29 50.35(18) . . . . ?
C2 Si1 C24 C29 -68.19(17) . . . . ?
C22 Si1 C24 C25 -6.27(19) . . . . ?
C23 Si1 C24 C25 -126.45(17) . . . . ?
C2 Si1 C24 C25 115.01(16) . . . . ?
C6 C5 C4 C3 -178.87(18) . . . . ?
C10 C5 C4 C3 -0.9(3) . . . . ?
C8 C9 C10 C5 -1.1(3) . . . . ?
C8 C9 C10 C1 -177.05(17) . . . . ?
C4 C5 C10 C9 -175.81(17) . . . . ?
C6 C5 C10 C9 2.3(3) . . . . ?
C4 C5 C10 C1 0.3(3) . . . . ?
C6 C5 C10 C1 178.42(17) . . . . ?
C2 C1 C10 C9 176.19(17) . . . . ?
C11 C1 C10 C9 -0.9(3) . . . . ?
C2 C1 C10 C5 0.2(3) . . . . ?
C11 C1 C10 C5 -176.85(16) . . . . ?
C12 C13 C14 C15 -0.2(3) . . . . ?
C10 C1 C2 C3 -0.3(3) . . . . ?
C11 C1 C2 C3 176.68(16) . . . . ?
C10 C1 C2 Si1 -176.20(13) . . . . ?
C11 C1 C2 Si1 0.8(2) . . . . ?
C22 Si1 C2 C1 86.12(17) . . . . ?
C23 Si1 C2 C1 -155.33(16) . . . . ?
C24 Si1 C2 C1 -36.34(18) . . . . ?
C22 Si1 C2 C3 -89.80(16) . . . . ?
C23 Si1 C2 C3 28.75(17) . . . . ?
C24 Si1 C2 C3 147.74(14) . . . . ?
C17 C16 C15 C14 0.5(3) . . . . ?
C13 C14 C15 C16 -0.5(3) . . . . ?
C5 C4 C3 C2 0.8(3) . . . . ?
C1 C2 C3 C4 -0.2(3) . . . . ?
Si1 C2 C3 C4 175.99(15) . . . . ?
C10 C9 C8 C7 -1.0(3) . . . . ?
C29 C24 C25 C26 -0.3(3) . . . . ?
Si1 C24 C25 C26 176.61(16) . . . . ?
C24 C25 C26 C27 0.1(3) . . . . ?
C4 C5 C6 C7 176.55(19) . . . . ?
C10 C5 C6 C7 -1.5(3) . . . . ?
C5 C6 C7 C8 -0.6(3) . . . . ?
C9 C8 C7 C6 1.9(3) . . . . ?
C27 C28 C29 C24 0.4(3) . . . . ?
C25 C24 C29 C28 0.0(3) . . . . ?
Si1 C24 C29 C28 -176.95(15) . . . . ?
C25 C26 C27 C28 0.3(3) . . . . ?
C29 C28 C27 C26 -0.6(3) . . . . ?

_refine_diff_density_max         0.168
_refine_diff_density_min         -0.203
_refine_diff_density_rms         0.031



