1,1'-Butane-1,4-diylbis(1<i>H</i>-benzimidazole)
Mehmet Akkurt; Selvi Karaca; Hasan Küçükbay; Orhan Büyükgüngör; Acta Crystallographica Section E 63 (2007) o1065–o1066; doi:10.1107/S1600536807003911

data_2212389
_publ_section_title
;
 1,1'-Butane-1,4-diylbis(1<i>H</i>-benzimidazole)
;
_journal_coeditor_code           TK2126
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1065
_journal_page_last               o1066
_journal_paper_doi               10.1107/S1600536807003911
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C18 H18 N4'
_chemical_formula_moiety         'C18 H18 N4'
_chemical_formula_sum            'C18 H18 N4'
_chemical_formula_weight         290.36
_chemical_name_systematic
;
1,1'-Butane-1,4-diylbis(1H-benzimidazole)
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_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
_cell_angle_beta                 99.042(6)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.6495(4)
_cell_length_b                   10.6323(7)
_cell_length_c                   12.7814(9)
_cell_measurement_reflns_used    11055
_cell_measurement_temperature    296
_cell_measurement_theta_max      28.0
_cell_measurement_theta_min      2.5
_cell_volume                     758.20(9)
_computing_cell_refinement       X-AREA
_computing_data_collection       'X-AREA (Stoe & Cie, 2002)'
_computing_data_reduction        'X-RED32 (Stoe & Cie, 2002)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare <i>et al.</i>,  1999)'
_diffrn_ambient_temperature      296
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'Stoe IPDS-2'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.062
_diffrn_reflns_av_sigmaI/netI    0.028
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            11438
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        27.9
_diffrn_reflns_theta_max         27.9
_diffrn_reflns_theta_min         2.5
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             308
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.13
_refine_diff_density_min         -0.11
_refine_ls_extinction_coef       0.086(8)
_refine_ls_extinction_expression fc^*^=kfc[1+0.001xfc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.04
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     101
_refine_ls_number_reflns         1795
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.04
_refine_ls_R_factor_all          0.043
_refine_ls_R_factor_gt           0.031
_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^)+(0.0449P)^2^+0.023P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.081
_refine_ls_wR_factor_ref         0.085
_reflns_number_gt                1354
_reflns_number_total             1795
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            tk2126.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2212389
_cod_database_fobs_code          2212389