1,4-Bis(1<i>H</i>-benzimidazol-1-yl)benzene
Sun, Guo-Feng; Hu, Jian-Ping; Tang, Dian-Yong; Zhang, Yuan-Qin; Acta Crystallographica Section E 67 (2011) o2286–; doi:10.1107/S1600536811031278

data_2231492
_publ_section_title
;
 1,4-Bis(1<i>H</i>-benzimidazol-1-yl)benzene
;
_journal_coeditor_code           HB6340
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2286
_journal_paper_doi               10.1107/S1600536811031278
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C20 H14 N4'
_chemical_formula_moiety         'C20 H14 N4'
_chemical_formula_sum            'C20 H14 N4'
_chemical_formula_weight         310.35
_chemical_melting_point          564
_chemical_name_systematic
;
1,4-Bis(1<i>H</i>-benzimidazol-1-yl)benzene
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.5458(19)
_cell_length_b                   20.499(4)
_cell_length_c                   7.9283(16)
_cell_measurement_pressure       101.3
_cell_measurement_reflns_used    13068
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.6
_cell_measurement_theta_min      3.3
_cell_volume                     1551.4(5)
_computing_cell_refinement       'CrystalClear (Rigaku/MSC, 2005)'
_computing_data_collection       'CrystalClear (Rigaku/MSC, 2005)'
_computing_data_reduction        'CrystalClear (Rigaku/MSC, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku Mercury CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0748
_diffrn_reflns_av_sigmaI/netI    0.0368
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            12744
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         3.49
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.985
_exptl_absorpt_correction_T_min  0.980
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrystalClear; Rigaku/MSC, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.329
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.138
_refine_diff_density_min         -0.159
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.167
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     231
_refine_ls_number_reflns         1479
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.167
_refine_ls_R_factor_all          0.0609
_refine_ls_R_factor_gt           0.0505
_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^)+(0.0488P)^2^+0.1271P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1005
_refine_ls_wR_factor_ref         0.1044
_reflns_number_gt                1298
_reflns_number_total             1479
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb6340.cif
_cod_data_source_block           I
_cod_database_code               2231492
_cod_database_fobs_code          2231492