Synthesis and Functionalization of a 1,2-Bis(trimethylsilyl)-1,2-disilacyclohexene That Can Serve as a Unit of cis-1,2-Dialkyldisilene
Akasaka, N.; Tanaka, K.; Ishida, S.; Iwamoto, T.; Inorganics 6 (2018) 21–; doi:10.3390/inorganics6010021

data_1556583
_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            'C22 H58 Si8'
_chemical_formula_weight         547.40
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.3380(16)
_cell_length_b                   18.0108(17)
_cell_length_c                   22.317(2)
_cell_measurement_reflns_used    9919
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.79
_cell_measurement_theta_min      2.45
_cell_volume                     6969.0(11)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'Yadokari-XG (Wakita, Nemoto et al., 2009)'
_computing_publication_material  'Yadokari-XG (Wakita, Nemoto et al., 2009)'
_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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0149
_diffrn_reflns_av_unetI/netI     0.0112
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            34080
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.999
_diffrn_reflns_theta_min         1.825
_exptl_absorpt_coefficient_mu    0.318
_exptl_absorpt_correction_T_max  0.9392
_exptl_absorpt_correction_T_min  0.9107
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
SADABS Sheldrick 1996
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.043
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2416
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.345
_refine_diff_density_min         -0.243
_refine_diff_density_rms         0.039
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     289
_refine_ls_number_reflns         6843
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0251
_refine_ls_R_factor_gt           0.0218
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0302P)^2^+2.9173P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0583
_refine_ls_wR_factor_ref         0.0619
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                6255
_reflns_number_total             6843
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            Cpd1_si356a.cif
_cod_data_source_block           si356a
_cod_database_code               1556583
_shelx_estimated_absorpt_t_min   0.911
_shelx_estimated_absorpt_t_max   0.939
_shelx_res_checksum              68243
_shelx_hkl_checksum              78863