Benzimidazolium 3,5-dihydroxybenzoate
Xuan Huang; Jia-Geng Liu; Duan-Jun Xu; Acta Crystallographica Section E 62 (2006) o276–o278; doi:10.1107/S160053680504170X

data_2207790
_publ_section_title
;
 Benzimidazolium 3,5-dihydroxybenzoate
;
_journal_coeditor_code           HG6284
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o276
_journal_page_last               o278
_journal_paper_doi               10.1107/S160053680504170X
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C7 H7 N2 +, C7 H5 O4 -'
_chemical_formula_moiety         'C7 H7 N2 +, C7 H5 O4 -'
_chemical_formula_sum            'C14 H12 N2 O4'
_chemical_formula_weight         272.26
_chemical_name_systematic
;
Benzimidazolium 3,5-dihydroxybenzoate
;
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_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            8
_cell_length_a                   16.297(4)
_cell_length_b                   10.600(3)
_cell_length_c                   14.649(5)
_cell_measurement_reflns_used    19663
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.0
_cell_measurement_theta_min      3.1
_cell_volume                     2530.6(13)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       'PROCESS-AUTO (Rigaku, 1998)'
_computing_data_reduction        'CrystalStructure (Rigaku/MSC, 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    'SIR92 (Altomare <i>et al.</i>,  1993)'
_diffrn_ambient_temperature      295(2)
_diffrn_detector_area_resol_mean 10.00
_diffrn_measured_fraction_theta_full 1.00
_diffrn_measured_fraction_theta_max 1.00
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_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  0.037
_diffrn_reflns_av_sigmaI/netI    0.020
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            23272
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         3.1
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.107
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.429
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             1136
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.36
_refine_diff_density_max         0.35
_refine_diff_density_min         -0.29
_refine_ls_extinction_coef       0.0108(10)
_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   1.091
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     182
_refine_ls_number_reflns         2901
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.091
_refine_ls_R_factor_all          0.048
_refine_ls_R_factor_gt           0.041
_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^)+(0.0603P)^2^+0.6188P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.112
_refine_ls_wR_factor_ref         0.115
_reflns_number_gt                2435
_reflns_number_total             2901
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hg6284.cif
_cod_data_source_block           I
_cod_database_code               2207790
_cod_database_fobs_code          2207790