#------------------------------------------------------------------------------
#$Date: 2019-08-28 10:03:33 +0300 (Wed, 28 Aug 2019) $
#$Revision: 217773 $
#$URL: file:///home/coder/svn-repositories/cod/cif/7/23/35/7233503.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_7233503
loop_
_publ_author_name
'Engui Zhao'
'Jacky W. Y. Lam'
'Yuning Hong'
'Jianzhao Liu'
'Qian Peng'
'Jianhua Hao'
'Herman H. Y. Sung'
'Ian D. Williams'
'Ben Zhong Tang'
_publ_section_title
;
 How do substituents affect silole emission?
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              5661
_journal_page_last               5668
_journal_paper_doi               10.1039/C3TC30880D
_journal_volume                  1
_journal_year                    2013
_chemical_formula_moiety         'C39 H34 Si2'
_chemical_formula_sum            'C39 H34 Si2'
_chemical_formula_weight         558.84
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 104.794(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.8276(4)
_cell_length_b                   11.9360(3)
_cell_length_c                   15.0270(3)
_cell_measurement_reflns_used    4532
_cell_measurement_temperature    173.00(14)
_cell_measurement_theta_max      71.5772
_cell_measurement_theta_min      3.3698
_cell_volume                     3265.02(13)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
;
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
XL, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_computing_structure_solution
;
XS, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_diffrn_ambient_temperature      173.00(14)
_diffrn_detector_area_resol_mean 15.9578
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.971
_diffrn_measurement_details
;
#__ type_ start__ end____ width___ exp.time_
1 omega -24.00 41.00 1.0000 3.0000
omega____ theta____ kappa____ phi______ frames
- 0.0000 -99.0000 90.0000 65
#__ type_ start__ end____ width___ exp.time_
2 omega -84.00 -28.00 1.0000 3.0000
omega____ theta____ kappa____ phi______ frames
- -55.0000 77.0000 60.0000 56
#__ type_ start__ end____ width___ exp.time_
3 omega -124.00 -52.00 1.0000 3.0000
omega____ theta____ kappa____ phi______ frames
- -55.0000 -57.0000 60.0000 72
#__ type_ start__ end____ width___ exp.time_
4 omega 36.00 127.00 1.0000 3.0000
omega____ theta____ kappa____ phi______ frames
- 55.0000 38.0000 0.0000 91
#__ type_ start__ end____ width___ exp.time_
5 omega -139.00 -53.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- -64.0000 178.0000 90.0000 86
#__ type_ start__ end____ width___ exp.time_
6 omega 37.00 72.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -25.0000 0.0000 35
#__ type_ start__ end____ width___ exp.time_
7 omega 38.00 85.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -111.0000 -30.0000 47
#__ type_ start__ end____ width___ exp.time_
8 omega 123.00 149.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -93.0000 50.0000 26
#__ type_ start__ end____ width___ exp.time_
9 omega 37.00 63.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -25.0000 60.0000 26
#__ type_ start__ end____ width___ exp.time_
10 omega 38.00 70.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -38.0000 120.0000 32
#__ type_ start__ end____ width___ exp.time_
11 omega 38.00 148.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -92.0000 -90.0000 110
#__ type_ start__ end____ width___ exp.time_
12 omega 39.00 68.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -38.0000 -90.0000 29
#__ type_ start__ end____ width___ exp.time_
13 omega 42.00 177.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 12.0000 0.0000 135
#__ type_ start__ end____ width___ exp.time_
14 omega 39.00 71.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -38.0000 150.0000 32
#__ type_ start__ end____ width___ exp.time_
15 omega 37.00 70.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -25.0000 30.0000 33
#__ type_ start__ end____ width___ exp.time_
16 omega 40.00 71.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -38.0000 90.0000 31
#__ type_ start__ end____ width___ exp.time_
17 omega 46.00 78.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -50.0000 -60.0000 32
#__ type_ start__ end____ width___ exp.time_
18 omega 88.00 178.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 50.0000 30.0000 90
#__ type_ start__ end____ width___ exp.time_
19 omega 40.00 104.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -93.0000 50.0000 64
#__ type_ start__ end____ width___ exp.time_
20 omega -16.00 61.00 1.0000 3.0000
omega____ theta____ kappa____ phi______ frames
- 55.0000 -38.0000 -150.0000 77
#__ type_ start__ end____ width___ exp.time_
21 omega 38.00 149.00 1.0000 7.0000
omega____ theta____ kappa____ phi______ frames
- 110.0000 -93.0000 117.0000 111
#__ type_ start__ end____ width___ exp.time_
22 omega -65.00 -40.00 1.0000 3.0000
omega____ theta____ kappa____ phi______ frames
- -55.0000 57.0000 150.0000 25
;
_diffrn_measurement_device       'kappa diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Sapphire3, Gemini ultra'
_diffrn_measurement_method       'ω scans'
_diffrn_orient_matrix_UB_11      0.0461359000
_diffrn_orient_matrix_UB_12      0.0703245000
_diffrn_orient_matrix_UB_13      0.0681174000
_diffrn_orient_matrix_UB_21      0.0922547000
_diffrn_orient_matrix_UB_22      -0.0590409000
_diffrn_orient_matrix_UB_23      0.0041241000
_diffrn_orient_matrix_UB_31      0.0244432000
_diffrn_orient_matrix_UB_32      0.0906708000
_diffrn_orient_matrix_UB_33      -0.0501329000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.5418
_diffrn_reflns_av_R_equivalents  0.0765
_diffrn_reflns_av_unetI/netI     0.0641
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            17680
_diffrn_reflns_theta_full        66.50
_diffrn_reflns_theta_max         67.48
_diffrn_reflns_theta_min         4.79
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           30
_diffrn_source_power             1.5
_diffrn_source_target            Cu
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    1.160
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.37088
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.137
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.521
_refine_diff_density_min         -0.304
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     373
_refine_ls_number_reflns         5703
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0714
_refine_ls_R_factor_gt           0.0570
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[σ²(Fo²)+(0.0883P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1425
_refine_ls_wR_factor_ref         0.1556
_reflns_number_gt                4495
_reflns_number_total             5703
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000002.cif
_cod_data_source_block           PCOD1000002
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the built-in table derived from the
CIF Core dictionary named 'cif_core.dic' version 2.4.5 last updated
on 2014-11-21.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_cell_volume        3265.01(13)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7233503
_reflns_odcompleteness_completeness 98.05
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     68.13
loop_
_space_group_symop_id
_space_group_symop_operation_xyz
1 'x, y, z'
2 '-x, y+1/2, -z+1/2'
3 '-x, -y, -z'
4 'x, -y-1/2, z-1/2'
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 0.19827(3) 0.39602(5) 0.42394(4) 0.03666(17) Uani 1 1 d . . .
Si2 Si 0.52707(3) 0.29382(6) 0.02281(5) 0.04604(19) Uani 1 1 d . . .
C1 C 0.20547(11) 0.48075(17) 0.32092(14) 0.0370(4) Uani 1 1 d . . .
C2 C 0.14598(11) 0.54998(17) 0.29834(14) 0.0357(4) Uani 1 1 d . . .
C3 C 0.09159(11) 0.53741(17) 0.35608(14) 0.0358(4) Uani 1 1 d . . .
C4 C 0.10765(11) 0.45866(18) 0.42227(14) 0.0380(4) Uani 1 1 d . . .
H4 H 0.0775 0.4384 0.4617 0.046 Uiso 1 1 calc R . .
C10 C 0.48708(18) 0.3273(3) -0.1007(2) 0.0673(7) Uani 1 1 d . . .
H10A H 0.4362 0.3007 -0.1194 0.101 Uiso 1 1 calc R . .
H10B H 0.5158 0.2903 -0.1381 0.101 Uiso 1 1 calc R . .
H10C H 0.4881 0.4085 -0.1097 0.101 Uiso 1 1 calc R . .
C11 C 0.26288(11) 0.46875(17) 0.27103(15) 0.0374(4) Uani 1 1 d . . .
C12 C 0.24750(11) 0.46904(19) 0.17477(15) 0.0412(5) Uani 1 1 d . . .
H12 H 0.1988 0.4841 0.1398 0.049 Uiso 1 1 calc R . .
C13 C 0.30121(12) 0.44803(19) 0.12971(16) 0.0439(5) Uani 1 1 d . . .
H13 H 0.2890 0.4479 0.0643 0.053 Uiso 1 1 calc R . .
C14 C 0.37355(12) 0.42683(19) 0.17894(16) 0.0416(5) Uani 1 1 d . . .
C15 C 0.39019(12) 0.4291(2) 0.27482(17) 0.0460(5) Uani 1 1 d . . .
H15 H 0.4393 0.4170 0.3096 0.055 Uiso 1 1 calc R . .
C16 C 0.33587(12) 0.4488(2) 0.31972(16) 0.0452(5) Uani 1 1 d . . .
H16 H 0.3483 0.4489 0.3851 0.054 Uiso 1 1 calc R . .
C17 C 0.42736(13) 0.39455(19) 0.13138(18) 0.0463(5) Uani 1 1 d . . .
C18 C 0.47019(13) 0.3617(2) 0.08990(18) 0.0486(5) Uani 1 1 d . . .
C20 C 0.5211(2) 0.1418(2) 0.0420(3) 0.0749(9) Uani 1 1 d . . .
H20A H 0.5444 0.1244 0.1066 0.112 Uiso 1 1 calc R . .
H20B H 0.5463 0.1012 0.0023 0.112 Uiso 1 1 calc R . .
H20C H 0.4693 0.1191 0.0272 0.112 Uiso 1 1 calc R . .
C21 C 0.13502(12) 0.63392(18) 0.22319(15) 0.0396(5) Uani 1 1 d . . .
C22 C 0.18677(14) 0.7180(2) 0.22732(19) 0.0506(6) Uani 1 1 d . . .
H22 H 0.2288 0.7211 0.2782 0.061 Uiso 1 1 calc R . .
C23 C 0.17776(18) 0.7970(2) 0.1584(2) 0.0656(8) Uani 1 1 d . . .
H23 H 0.2126 0.8557 0.1632 0.079 Uiso 1 1 calc R . .
C24 C 0.11839(18) 0.7914(2) 0.0826(2) 0.0694(8) Uani 1 1 d . . .
H24 H 0.1132 0.8444 0.0342 0.083 Uiso 1 1 calc R . .
C25 C 0.06663(16) 0.7085(3) 0.07744(19) 0.0636(7) Uani 1 1 d . . .
H25 H 0.0257 0.7043 0.0253 0.076 Uiso 1 1 calc R . .
C26 C 0.07398(13) 0.6311(2) 0.14779(16) 0.0489(5) Uani 1 1 d . . .
H26 H 0.0372 0.5758 0.1447 0.059 Uiso 1 1 calc R . .
C30 C 0.62247(15) 0.3472(3) 0.0606(3) 0.0789(10) Uani 1 1 d . . .
H30A H 0.6222 0.4291 0.0554 0.118 Uiso 1 1 calc R . .
H30B H 0.6518 0.3153 0.0215 0.118 Uiso 1 1 calc R . .
H30C H 0.6439 0.3256 0.1247 0.118 Uiso 1 1 calc R . .
C31 C 0.02515(12) 0.60961(19) 0.34227(14) 0.0409(5) Uani 1 1 d . . .
C32 C 0.02800(15) 0.7256(2) 0.32879(17) 0.0516(6) Uani 1 1 d . . .
H32 H 0.0726 0.7599 0.3247 0.062 Uiso 1 1 calc R . .
C33 C -0.03473(19) 0.7899(3) 0.3215(2) 0.0674(8) Uani 1 1 d . . .
H33 H -0.0328 0.8684 0.3120 0.081 Uiso 1 1 calc R . .
C34 C -0.09973(17) 0.7415(3) 0.32774(19) 0.0728(9) Uani 1 1 d . . .
H34 H -0.1422 0.7864 0.3231 0.087 Uiso 1 1 calc R . .
C35 C -0.10281(15) 0.6274(3) 0.34079(19) 0.0654(8) Uani 1 1 d . . .
H35 H -0.1474 0.5937 0.3454 0.079 Uiso 1 1 calc R . .
C36 C -0.04092(12) 0.5621(2) 0.34723(16) 0.0503(6) Uani 1 1 d . . .
H36 H -0.0438 0.4834 0.3552 0.060 Uiso 1 1 calc R . .
C41 C 0.19698(11) 0.24052(19) 0.40785(15) 0.0413(5) Uani 1 1 d . . .
C42 C 0.24765(15) 0.1863(2) 0.36999(19) 0.0524(6) Uani 1 1 d . . .
H42 H 0.2847 0.2290 0.3531 0.063 Uiso 1 1 calc R . .
C43 C 0.24551(17) 0.0713(2) 0.3562(2) 0.0630(7) Uani 1 1 d . . .
H43 H 0.2801 0.0362 0.3291 0.076 Uiso 1 1 calc R . .
C44 C 0.19275(16) 0.0083(2) 0.3821(2) 0.0641(8) Uani 1 1 d . . .
H44 H 0.1914 -0.0707 0.3738 0.077 Uiso 1 1 calc R . .
C45 C 0.14222(15) 0.0597(2) 0.4200(2) 0.0635(7) Uani 1 1 d . . .
H45 H 0.1058 0.0162 0.4376 0.076 Uiso 1 1 calc R . .
C46 C 0.14409(13) 0.1758(2) 0.43276(19) 0.0524(6) Uani 1 1 d . . .
H46 H 0.1087 0.2106 0.4588 0.063 Uiso 1 1 calc R . .
C51 C 0.27224(11) 0.43760(19) 0.52849(14) 0.0396(4) Uani 1 1 d . . .
C52 C 0.29315(14) 0.5489(2) 0.54339(18) 0.0534(6) Uani 1 1 d . . .
H52 H 0.2697 0.6043 0.5004 0.064 Uiso 1 1 calc R . .
C53 C 0.34786(15) 0.5807(3) 0.6202(2) 0.0612(7) Uani 1 1 d . . .
H53 H 0.3616 0.6572 0.6292 0.073 Uiso 1 1 calc R . .
C54 C 0.38223(14) 0.5019(3) 0.68330(19) 0.0605(7) Uani 1 1 d . . .
H54 H 0.4195 0.5236 0.7359 0.073 Uiso 1 1 calc R . .
C55 C 0.36196(18) 0.3911(3) 0.6694(2) 0.0735(9) Uani 1 1 d . . .
H55 H 0.3856 0.3360 0.7125 0.088 Uiso 1 1 calc R . .
C56 C 0.30736(16) 0.3597(2) 0.59285(19) 0.0602(7) Uani 1 1 d . . .
H56 H 0.2937 0.2830 0.5844 0.072 Uiso 1 1 calc R . .
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'
Si Si 0.2541 0.3302 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
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
C4 Si1 C1 91.80(9) . .
C4 Si1 C41 114.58(10) . .
C4 Si1 C51 112.76(9) . .
C41 Si1 C1 115.33(10) . .
C41 Si1 C51 110.62(10) . .
C51 Si1 C1 110.59(10) . .
C18 Si2 C10 107.99(14) . .
C18 Si2 C20 106.31(13) . .
C18 Si2 C30 109.61(13) . .
C20 Si2 C10 109.98(16) . .
C20 Si2 C30 112.57(17) . .
C30 Si2 C10 110.22(17) . .
C2 C1 Si1 107.65(15) . .
C2 C1 C11 126.58(19) . .
C11 C1 Si1 125.68(15) . .
C1 C2 C3 115.57(18) . .
C1 C2 C21 123.0(2) . .
C21 C2 C3 121.44(18) . .
C4 C3 C2 115.92(18) . .
C4 C3 C31 122.0(2) . .
C31 C3 C2 122.10(18) . .
C3 C4 Si1 108.87(16) . .
C12 C11 C1 122.74(18) . .
C12 C11 C16 117.1(2) . .
C16 C11 C1 120.01(19) . .
C13 C12 C11 121.6(2) . .
C12 C13 C14 120.8(2) . .
C13 C14 C17 120.1(2) . .
C15 C14 C13 118.4(2) . .
C15 C14 C17 121.3(2) . .
C16 C15 C14 120.6(2) . .
C15 C16 C11 121.5(2) . .
C18 C17 C14 176.1(2) . .
C17 C18 Si2 171.8(2) . .
C22 C21 C2 119.6(2) . .
C22 C21 C26 118.5(2) . .
C26 C21 C2 121.9(2) . .
C23 C22 C21 120.7(3) . .
C24 C23 C22 120.4(3) . .
C25 C24 C23 119.6(2) . .
C24 C25 C26 120.3(3) . .
C25 C26 C21 120.4(2) . .
C32 C31 C3 122.0(2) . .
C36 C31 C3 119.3(2) . .
C36 C31 C32 118.7(2) . .
C33 C32 C31 119.6(3) . .
C34 C33 C32 121.0(3) . .
C35 C34 C33 119.6(2) . .
C34 C35 C36 120.1(3) . .
C35 C36 C31 121.1(3) . .
C42 C41 Si1 121.84(19) . .
C46 C41 Si1 120.33(18) . .
C46 C41 C42 117.8(2) . .
C43 C42 C41 121.7(3) . .
C44 C43 C42 119.5(3) . .
C45 C44 C43 119.9(3) . .
C44 C45 C46 120.3(3) . .
C41 C46 C45 120.7(2) . .
C52 C51 Si1 120.43(17) . .
C56 C51 Si1 121.79(19) . .
C56 C51 C52 117.8(2) . .
C51 C52 C53 121.0(2) . .
C54 C53 C52 120.4(3) . .
C53 C54 C55 119.3(2) . .
C54 C55 C56 120.3(3) . .
C51 C56 C55 121.4(3) . .
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Si1 C1 1.883(2) .
Si1 C4 1.857(2) .
Si1 C41 1.871(2) .
Si1 C51 1.881(2) .
Si2 C10 1.860(3) .
Si2 C18 1.836(2) .
Si2 C20 1.845(3) .
Si2 C30 1.853(3) .
C1 C2 1.363(3) .
C1 C11 1.471(3) .
C2 C3 1.509(3) .
C2 C21 1.484(3) .
C3 C4 1.346(3) .
C3 C31 1.489(3) .
C11 C12 1.401(3) .
C11 C16 1.403(3) .
C12 C13 1.376(3) .
C13 C14 1.397(3) .
C14 C15 1.394(3) .
C14 C17 1.434(3) .
C15 C16 1.381(3) .
C17 C18 1.204(4) .
C21 C22 1.389(3) .
C21 C26 1.393(3) .
C22 C23 1.379(4) .
C23 C24 1.379(5) .
C24 C25 1.377(4) .
C25 C26 1.383(4) .
C31 C32 1.402(3) .
C31 C36 1.386(3) .
C32 C33 1.389(4) .
C33 C34 1.378(5) .
C34 C35 1.378(5) .
C35 C36 1.385(4) .
C41 C42 1.389(3) .
C41 C46 1.386(3) .
C42 C43 1.387(4) .
C43 C44 1.379(4) .
C44 C45 1.372(4) .
C45 C46 1.398(4) .
C51 C52 1.388(3) .
C51 C56 1.382(3) .
C52 C53 1.389(4) .
C53 C54 1.374(4) .
C54 C55 1.378(4) .
C55 C56 1.384(4) .
