1,4-Bis(dimethylsilyl)-2,5-diphenylbenzene
Fang, Lei; Wang, Rui; Chen, Li-Min; Xu, Cai-Hong; Li, Shu-Hong; Acta Crystallographica Section E 66 (2010) o970–; doi:10.1107/S1600536810010913

data_2225542
_publ_section_title
;
 1,4-Bis(dimethylsilyl)-2,5-diphenylbenzene
;
_journal_coeditor_code           GK2260
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o970
_journal_paper_doi               10.1107/S1600536810010913
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C22 H26 Si2'
_chemical_formula_moiety         'C22 H26 Si2'
_chemical_formula_sum            'C22 H26 Si2'
_chemical_formula_weight         346.61
_chemical_name_systematic
;
1,4-Bis(dimethylsilyl)-2,5-diphenylbenzene
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 123.1660(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.8966(3)
_cell_length_b                   6.01320(10)
_cell_length_c                   26.1211(6)
_cell_measurement_reflns_used    4032
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.74
_cell_volume                     1958.65(7)
_computing_cell_refinement       'RAPID-AUTO (Rigaku, 2001)'
_computing_data_collection       'RAPID-AUTO (Rigaku, 2001)'
_computing_data_reduction        'RAPID-AUTO (Rigaku, 2001)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID IP area-detector'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0277
_diffrn_reflns_av_sigmaI/netI    0.0320
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            4032
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.74
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.182
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.905
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(ABSCOR; Higashi, 1995)
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.175
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.56
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.397
_refine_diff_density_min         -0.217
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.222
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     111
_refine_ls_number_reflns         2220
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.222
_refine_ls_R_factor_all          0.0661
_refine_ls_R_factor_gt           0.0546
_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/[\s^2^(Fo^2^)+(0.0432P)^2^+2.0232P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1138
_refine_ls_wR_factor_ref         0.1184
_reflns_number_gt                2009
_reflns_number_total             2220
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            gk2260.cif
_cod_data_source_block           I
_cod_original_cell_volume        1958.64(7)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2225542
_cod_database_fobs_code          2225542