#------------------------------------------------------------------------------
#$Date: 2019-12-16 11:41:05 +0200 (Mon, 16 Dec 2019) $
#$Revision: 245204 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/55/65/1556584.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_1556584
loop_
_publ_author_name
'Akasaka, N.'
'Tanaka, K.'
'Ishida, S.'
'Iwamoto, T.'
_publ_section_title
;
 Synthesis and Functionalization of a
 1,2-Bis(trimethylsilyl)-1,2-disilacyclohexene That Can Serve as a Unit of
 cis-1,2-Dialkyldisilene
;
_journal_name_full               Inorganics
_journal_page_first              21
_journal_paper_doi               10.3390/inorganics6010021
_journal_volume                  6
_journal_year                    2018
_chemical_formula_sum            'C26 H57 K Si7'
_chemical_formula_weight         605.44
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_cell_angle_alpha                90
_cell_angle_beta                 107.1880(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.7323(17)
_cell_length_b                   11.7003(13)
_cell_length_c                   21.031(2)
_cell_measurement_reflns_used    9859
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.84
_cell_measurement_theta_min      2.21
_cell_volume                     3698.3(7)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  'Bruker Helios multilayer confocal mirror'
_diffrn_radiation_source         'Bruker TXS fine-focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0144
_diffrn_reflns_av_unetI/netI     0.0156
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            17624
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.500
_diffrn_reflns_theta_min         2.014
_exptl_absorpt_coefficient_mu    0.384
_exptl_absorpt_correction_T_max  0.9271
_exptl_absorpt_correction_T_min  0.8934
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
SADABS Sheldrick 1996
;
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.087
_exptl_crystal_description       block
_exptl_crystal_F_000             1320
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.355
_refine_diff_density_min         -0.220
_refine_diff_density_rms         0.040
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     323
_refine_ls_number_reflns         6854
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0256
_refine_ls_R_factor_gt           0.0234
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[σ²(Fo²)+(0.0310P)²+1.6187P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0624
_refine_ls_wR_factor_ref         0.0642
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                6366
_reflns_number_total             6854
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            Cpd4_si357b_final_171122.cif
_cod_data_source_block           si357b
_cod_original_cell_volume        3698.4(7)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1556584
_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.
;
_shelx_estimated_absorpt_t_min   0.893
_shelx_estimated_absorpt_t_max   0.927
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x+1/2, y+1/2, -z+1/2'
'-x, -y, -z'
'x-1/2, -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_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 0.83089(2) 0.94147(3) -0.01083(2) 0.01458(8) Uani 1 1 d . . . . .
Si2 Si 0.85155(2) 0.80526(3) 0.06456(2) 0.01624(8) Uani 1 1 d . . . . .
K1 K 1.02547(2) 1.03666(3) 0.10740(2) 0.02397(8) Uani 1 1 d . . . . .
Si3 Si 0.98221(2) 0.70058(3) 0.08219(2) 0.02203(9) Uani 1 1 d . . . . .
C1 C 0.71039(8) 0.99513(10) -0.01578(6) 0.0144(2) Uani 1 1 d . . . . .
C2 C 0.65787(8) 0.91191(10) 0.01733(6) 0.0156(2) Uani 1 1 d . . . . .
H1 H 0.5984 0.9456 0.0120 0.019 Uiso 1 1 calc R U . . .
H2 H 0.6485 0.8394 -0.0080 0.019 Uiso 1 1 calc R U . . .
C3 C 0.69964(8) 0.88259(10) 0.09188(6) 0.0159(2) Uani 1 1 d . . . . .
H3 H 0.6507 0.8707 0.1119 0.019 Uiso 1 1 calc R U . . .
H4 H 0.7341 0.9498 0.1141 0.019 Uiso 1 1 calc R U . . .
C4 C 0.76259(8) 0.77476(10) 0.10832(6) 0.0159(2) Uani 1 1 d . . . . .
C5 C 1.07569(10) 0.74054(17) 0.15912(8) 0.0425(4) Uani 1 1 d . . . . .
H5 H 1.0529 0.7429 0.1977 0.064 Uiso 1 1 calc R U . . .
H6 H 1.0992 0.8158 0.1527 0.064 Uiso 1 1 calc R U . . .
H7 H 1.1233 0.6835 0.1667 0.064 Uiso 1 1 calc R U . . .
C6 C 0.96953(12) 0.54149(13) 0.08445(10) 0.0449(4) Uani 1 1 d . . . . .
H8 H 0.9233 0.5164 0.0445 0.067 Uiso 1 1 calc R U . . .
H9 H 0.9526 0.5201 0.1241 0.067 Uiso 1 1 calc R U . . .
H10 H 1.0261 0.5048 0.0860 0.067 Uiso 1 1 calc R U . . .
C7 C 1.02571(9) 0.73527(13) 0.01019(7) 0.0272(3) Uani 1 1 d . . . . .
H11 H 1.0765 0.6858 0.0117 0.041 Uiso 1 1 calc R U . . .
H12 H 1.0446 0.8154 0.0130 0.041 Uiso 1 1 calc R U . . .
H13 H 0.9786 0.7227 -0.0317 0.041 Uiso 1 1 calc R U . . .
C8 C 0.53195(8) 1.05824(12) -0.12376(7) 0.0247(3) Uani 1 1 d . . . . .
H14 H 0.5367 1.1394 -0.1118 0.037 Uiso 1 1 calc R U . . .
H15 H 0.5002 1.0177 -0.0969 0.037 Uiso 1 1 calc R U . . .
H16 H 0.4992 1.0500 -0.1710 0.037 Uiso 1 1 calc R U . . .
C9 C 0.70256(9) 1.07469(12) -0.16214(7) 0.0252(3) Uani 1 1 d . . . . .
H17 H 0.7651 1.0515 -0.1509 0.038 Uiso 1 1 calc R U . . .
H18 H 0.6991 1.1571 -0.1551 0.038 Uiso 1 1 calc R U . . .
H19 H 0.6726 1.0566 -0.2089 0.038 Uiso 1 1 calc R U . . .
C10 C 0.63098(9) 0.84513(12) -0.13984(6) 0.0245(3) Uani 1 1 d . . . . .
H20 H 0.6096 0.8462 -0.1886 0.037 Uiso 1 1 calc R U . . .
H21 H 0.5873 0.8063 -0.1225 0.037 Uiso 1 1 calc R U . . .
H22 H 0.6878 0.8043 -0.1252 0.037 Uiso 1 1 calc R U . . .
Si4 Si 0.71668(2) 1.14347(3) 0.02175(2) 0.01587(8) Uani 1 1 d . . . . .
C11 C 0.82078(8) 1.17157(11) 0.09193(6) 0.0196(3) Uani 1 1 d . . . . .
H23 H 0.8713 1.1799 0.0740 0.029 Uiso 1 1 calc R U . . .
H24 H 0.8317 1.1074 0.1233 0.029 Uiso 1 1 calc R U . . .
H25 H 0.8135 1.2420 0.1150 0.029 Uiso 1 1 calc R U . . .
C12 C 0.62088(9) 1.16777(12) 0.05670(7) 0.0248(3) Uani 1 1 d . . . . .
H26 H 0.6275 1.1180 0.0954 0.037 Uiso 1 1 calc R U . . .
H27 H 0.5648 1.1501 0.0226 0.037 Uiso 1 1 calc R U . . .
H28 H 0.6205 1.2478 0.0703 0.037 Uiso 1 1 calc R U . . .
C13 C 0.71525(10) 1.26329(11) -0.03806(7) 0.0263(3) Uani 1 1 d . . . . .
H29 H 0.7250 1.3361 -0.0140 0.039 Uiso 1 1 calc R U . . .
H30 H 0.6575 1.2649 -0.0724 0.039 Uiso 1 1 calc R U . . .
H31 H 0.7625 1.2513 -0.0590 0.039 Uiso 1 1 calc R U . . .
Si5 Si 0.81153(2) 0.77487(3) 0.20196(2) 0.01929(8) Uani 1 1 d . . . . .
C14 C 0.72115(9) 0.76358(13) 0.24321(7) 0.0281(3) Uani 1 1 d . . . . .
H32 H 0.6915 0.6893 0.2327 0.042 Uiso 1 1 calc R U . . .
H33 H 0.6777 0.8249 0.2270 0.042 Uiso 1 1 calc R U . . .
H34 H 0.7471 0.7706 0.2915 0.042 Uiso 1 1 calc R U . . .
C15 C 0.87272(11) 0.91178(14) 0.23181(7) 0.0333(3) Uani 1 1 d . . . . .
H35 H 0.8320 0.9765 0.2178 0.050 Uiso 1 1 calc R U . . .
H36 H 0.9223 0.9196 0.2128 0.050 Uiso 1 1 calc R U . . .
H37 H 0.8959 0.9107 0.2805 0.050 Uiso 1 1 calc R U . . .
C16 C 0.89298(10) 0.65741(14) 0.23749(7) 0.0325(3) Uani 1 1 d . . . . .
H38 H 0.9293 0.6786 0.2824 0.049 Uiso 1 1 calc R U . . .
H39 H 0.9316 0.6457 0.2091 0.049 Uiso 1 1 calc R U . . .
H40 H 0.8606 0.5866 0.2395 0.049 Uiso 1 1 calc R U . . .
Si6 Si 0.69664(2) 0.63941(3) 0.07574(2) 0.01963(8) Uani 1 1 d . . . . .
C17 C 0.57827(9) 0.65511(13) 0.07688(8) 0.0324(3) Uani 1 1 d . . . . .
H41 H 0.5465 0.5830 0.0631 0.049 Uiso 1 1 calc R U . . .
H42 H 0.5492 0.7161 0.0462 0.049 Uiso 1 1 calc R U . . .
H43 H 0.5773 0.6744 0.1220 0.049 Uiso 1 1 calc R U . . .
C18 C 0.69334(11) 0.59951(12) -0.01133(7) 0.0333(3) Uani 1 1 d . . . . .
H44 H 0.7535 0.5808 -0.0126 0.050 Uiso 1 1 calc R U . . .
H45 H 0.6702 0.6639 -0.0412 0.050 Uiso 1 1 calc R U . . .
H46 H 0.6545 0.5330 -0.0257 0.050 Uiso 1 1 calc R U . . .
C19 C 0.73964(10) 0.50746(12) 0.12561(8) 0.0294(3) Uani 1 1 d . . . . .
H47 H 0.7049 0.4411 0.1040 0.044 Uiso 1 1 calc R U . . .
H48 H 0.7342 0.5162 0.1706 0.044 Uiso 1 1 calc R U . . .
H49 H 0.8023 0.4962 0.1283 0.044 Uiso 1 1 calc R U . . .
C20 C 1.15097(11) 1.09550(13) 0.27095(7) 0.0334(3) Uani 1 1 d . . . . .
C21 C 1.18418(9) 1.15726(13) 0.22817(7) 0.0308(3) Uani 1 1 d . . . . .
H50 H 1.2422 1.1407 0.2256 0.037 Uiso 1 1 calc R U . . .
C22 C 1.13498(11) 1.24330(13) 0.18860(7) 0.0342(3) Uani 1 1 d . . . . .
H51 H 1.1591 1.2850 0.1592 0.041 Uiso 1 1 calc R U . . .
C23 C 1.05035(11) 1.26807(14) 0.19221(8) 0.0404(4) Uani 1 1 d . . . . .
H52 H 1.0160 1.3269 0.1655 0.048 Uiso 1 1 calc R U . . .
C24 C 1.01654(10) 1.20608(16) 0.23529(9) 0.0422(4) Uani 1 1 d . . . . .
H53 H 0.9586 1.2226 0.2381 0.051 Uiso 1 1 calc R U . . .
C25 C 1.06581(11) 1.12106(15) 0.27393(8) 0.0379(4) Uani 1 1 d . . . . .
H54 H 1.0415 1.0790 0.3031 0.045 Uiso 1 1 calc R U . . .
C26 C 1.20584(15) 1.00384(18) 0.31449(10) 0.0564(5) Uani 1 1 d . . . . .
H55 H 1.2469 0.9708 0.2924 0.085 Uiso 1 1 calc R U . . .
H56 H 1.1665 0.9439 0.3222 0.085 Uiso 1 1 calc R U . . .
H57 H 1.2398 1.0372 0.3572 0.085 Uiso 1 1 calc R U . . .
Si7 Si 0.64672(2) 0.99579(3) -0.10763(2) 0.01648(8) Uani 1 1 d . . . . .
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'
Si Si 0.0817 0.0704 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
K K 0.2009 0.2494 '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
C1 Si1 Si2 101.74(4) . .
C1 Si1 K1 136.83(4) . 3_775
Si2 Si1 K1 119.478(16) . 3_775
C1 Si1 K1 124.12(4) . .
Si2 Si1 K1 78.883(15) . .
K1 Si1 K1 78.948(13) 3_775 .
C4 Si2 Si1 120.36(4) . .
C4 Si2 Si3 124.06(4) . .
Si1 Si2 Si3 115.525(19) . .
C4 Si2 K1 126.84(4) . .
Si1 Si2 K1 66.064(14) . .
Si3 Si2 K1 78.170(16) . .
C22 K1 C23 25.16(4) . .
C22 K1 C21 24.64(4) . .
C23 K1 C21 43.18(4) . .
C22 K1 C24 42.70(4) . .
C23 K1 C24 24.09(5) . .
C21 K1 C24 48.49(4) . .
C22 K1 Si1 85.09(3) . 3_775
C23 K1 Si1 105.69(4) . 3_775
C21 K1 Si1 86.76(3) . 3_775
C24 K1 Si1 127.67(3) . 3_775
C22 K1 C20 42.07(4) . .
C23 K1 C20 49.00(4) . .
C21 K1 C20 23.08(4) . .
C24 K1 C20 40.90(4) . .
Si1 K1 C20 106.61(3) 3_775 .
C22 K1 Si1 148.03(3) . .
C23 K1 Si1 126.94(3) . .
C21 K1 Si1 169.51(3) . .
C24 K1 Si1 121.21(3) . .
Si1 K1 Si1 101.051(13) 3_775 .
C20 K1 Si1 151.92(3) . .
C22 K1 C25 48.47(4) . .
C23 K1 C25 41.43(4) . .
C21 K1 C25 40.60(4) . .
C24 K1 C25 22.84(4) . .
Si1 K1 C25 127.36(3) 3_775 .
C20 K1 C25 22.93(4) . .
Si1 K1 C25 131.24(3) . .
C22 K1 Si2 157.07(3) . .
C23 K1 Si2 134.59(4) . .
C21 K1 Si2 145.22(3) . .
C24 K1 Si2 114.48(3) . .
Si1 K1 Si2 117.813(12) 3_775 .
C20 K1 Si2 122.48(3) . .
Si1 K1 Si2 35.054(8) . .
C25 K1 Si2 110.20(3) . .
C22 K1 K1 127.17(3) . 3_775
C23 K1 K1 133.39(3) . 3_775
C21 K1 K1 137.20(3) . 3_775
C24 K1 K1 152.59(4) . 3_775
Si1 K1 K1 50.935(9) 3_775 3_775
C20 K1 K1 157.15(3) . 3_775
Si1 K1 K1 50.116(8) . 3_775
C25 K1 K1 174.82(3) . 3_775
Si2 K1 K1 73.572(9) . 3_775
C6 Si3 C7 107.55(7) . .
C6 Si3 C5 106.55(9) . .
C7 Si3 C5 105.00(7) . .
C6 Si3 Si2 115.55(6) . .
C7 Si3 Si2 105.82(5) . .
C5 Si3 Si2 115.61(6) . .
C2 C1 Si7 105.44(8) . .
C2 C1 Si4 110.68(8) . .
Si7 C1 Si4 111.54(6) . .
C2 C1 Si1 113.82(8) . .
Si7 C1 Si1 105.40(6) . .
Si4 C1 Si1 109.78(6) . .
C3 C2 C1 117.76(10) . .
C2 C3 C4 116.74(10) . .
C3 C4 Si5 105.28(8) . .
C3 C4 Si6 110.23(8) . .
Si5 C4 Si6 112.69(6) . .
C3 C4 Si2 104.20(8) . .
Si5 C4 Si2 111.63(6) . .
Si6 C4 Si2 112.22(6) . .
C13 Si4 C11 103.31(6) . .
C13 Si4 C12 107.21(6) . .
C11 Si4 C12 106.19(6) . .
C13 Si4 C1 114.53(6) . .
C11 Si4 C1 114.37(5) . .
C12 Si4 C1 110.55(6) . .
C14 Si5 C16 106.61(7) . .
C14 Si5 C15 106.80(7) . .
C16 Si5 C15 105.61(7) . .
C14 Si5 C4 110.52(6) . .
C16 Si5 C4 115.72(6) . .
C15 Si5 C4 111.06(6) . .
C18 Si6 C19 104.02(7) . .
C18 Si6 C17 107.17(7) . .
C19 Si6 C17 105.57(7) . .
C18 Si6 C4 114.38(6) . .
C19 Si6 C4 114.49(6) . .
C17 Si6 C4 110.52(6) . .
C21 C20 C25 118.32(15) . .
C21 C20 C26 120.87(16) . .
C25 C20 C26 120.80(16) . .
C21 C20 K1 70.84(8) . .
C25 C20 K1 79.34(9) . .
C26 C20 K1 120.96(11) . .
C20 C21 C22 121.50(14) . .
C20 C21 K1 86.08(9) . .
C22 C21 K1 71.82(8) . .
C23 C22 C21 119.57(15) . .
C23 C22 K1 79.08(9) . .
C21 C22 K1 83.54(9) . .
C24 C23 C22 119.17(15) . .
C24 C23 K1 85.07(10) . .
C22 C23 K1 75.76(9) . .
C25 C24 C23 120.61(15) . .
C25 C24 K1 84.08(9) . .
C23 C24 K1 70.84(9) . .
C24 C25 C20 120.83(15) . .
C24 C25 K1 73.08(9) . .
C20 C25 K1 77.73(9) . .
C10 Si7 C9 106.05(6) . .
C10 Si7 C8 106.37(6) . .
C9 Si7 C8 107.19(6) . .
C10 Si7 C1 109.72(6) . .
C9 Si7 C1 114.97(6) . .
C8 Si7 C1 112.03(6) . .
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Si1 C1 1.9703(12) .
Si1 Si2 2.2035(5) .
Si1 K1 3.4655(5) 3_775
Si1 K1 3.5066(5) .
Si2 C4 1.9219(12) .
Si2 Si3 2.3265(5) .
Si2 K1 3.7645(5) .
K1 C22 3.1609(15) .
K1 C23 3.2021(16) .
K1 C21 3.3059(14) .
K1 C24 3.3774(16) .
K1 Si1 3.4655(5) 3_775
K1 C20 3.4914(15) .
K1 C25 3.5115(16) .
K1 K1 4.4325(7) 3_775
Si3 C6 1.8742(16) .
Si3 C7 1.8810(14) .
Si3 C5 1.8955(17) .
C1 C2 1.5671(16) .
C1 Si7 1.8951(12) .
C1 Si4 1.8971(12) .
C2 C3 1.5489(16) .
C3 C4 1.5778(16) .
C4 Si5 1.8909(13) .
C4 Si6 1.9063(13) .
C8 Si7 1.8835(13) .
C9 Si7 1.8797(14) .
C10 Si7 1.8785(14) .
Si4 C13 1.8792(14) .
Si4 C11 1.8814(13) .
Si4 C12 1.8836(13) .
Si5 C14 1.8764(14) .
Si5 C16 1.8771(15) .
Si5 C15 1.8788(15) .
Si6 C18 1.8757(15) .
Si6 C19 1.8766(14) .
Si6 C17 1.8784(15) .
C20 C21 1.372(2) .
C20 C25 1.392(2) .
C20 C26 1.506(2) .
C21 C22 1.387(2) .
C22 C23 1.386(2) .
C23 C24 1.384(3) .
C24 C25 1.371(3) .
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
Si7 C1 C2 C3 173.29(8) . . . .
Si4 C1 C2 C3 -65.95(12) . . . .
Si1 C1 C2 C3 58.25(12) . . . .
C1 C2 C3 C4 -90.39(13) . . . .
C2 C3 C4 Si5 173.53(8) . . . .
C2 C3 C4 Si6 -64.68(11) . . . .
C2 C3 C4 Si2 55.93(11) . . . .
C2 C1 Si4 C13 -146.62(8) . . . .
Si7 C1 Si4 C13 -29.56(8) . . . .
Si1 C1 Si4 C13 86.89(7) . . . .
C2 C1 Si4 C11 94.39(9) . . . .
Si7 C1 Si4 C11 -148.55(6) . . . .
Si1 C1 Si4 C11 -32.09(8) . . . .
C2 C1 Si4 C12 -25.39(10) . . . .
Si7 C1 Si4 C12 91.67(7) . . . .
Si1 C1 Si4 C12 -151.87(6) . . . .
C3 C4 Si5 C14 60.33(9) . . . .
Si6 C4 Si5 C14 -59.85(8) . . . .
Si2 C4 Si5 C14 172.79(7) . . . .
C3 C4 Si5 C16 -178.39(8) . . . .
Si6 C4 Si5 C16 61.43(9) . . . .
Si2 C4 Si5 C16 -65.93(9) . . . .
C3 C4 Si5 C15 -58.02(10) . . . .
Si6 C4 Si5 C15 -178.21(7) . . . .
Si2 C4 Si5 C15 54.44(9) . . . .
C25 C20 C21 C22 0.0(2) . . . .
C26 C20 C21 C22 -178.87(15) . . . .
K1 C20 C21 C22 65.87(12) . . . .
C25 C20 C21 K1 -65.82(13) . . . .
C26 C20 C21 K1 115.27(15) . . . .
C20 C21 C22 C23 0.1(2) . . . .
K1 C21 C22 C23 73.54(13) . . . .
C20 C21 C22 K1 -73.40(13) . . . .
C21 C22 C23 C24 -0.1(2) . . . .
K1 C22 C23 C24 75.92(13) . . . .
C21 C22 C23 K1 -76.04(13) . . . .
C22 C23 C24 C25 -0.1(2) . . . .
K1 C23 C24 C25 70.58(14) . . . .
C22 C23 C24 K1 -70.67(13) . . . .
C23 C24 C25 C20 0.3(2) . . . .
K1 C24 C25 C20 63.88(14) . . . .
C23 C24 C25 K1 -63.59(14) . . . .
C21 C20 C25 C24 -0.3(2) . . . .
C26 C20 C25 C24 178.65(16) . . . .
K1 C20 C25 C24 -61.53(14) . . . .
C21 C20 C25 K1 61.27(12) . . . .
C26 C20 C25 K1 -119.82(15) . . . .
C2 C1 Si7 C10 -53.22(9) . . . .
Si4 C1 Si7 C10 -173.41(6) . . . .
Si1 C1 Si7 C10 67.50(7) . . . .
C2 C1 Si7 C9 -172.62(8) . . . .
Si4 C1 Si7 C9 67.19(8) . . . .
Si1 C1 Si7 C9 -51.91(8) . . . .
C2 C1 Si7 C8 64.69(9) . . . .
Si4 C1 Si7 C8 -55.51(8) . . . .
Si1 C1 Si7 C8 -174.60(6) . . . .
