Redetermination of 2,2'-bipyridine-1,1'-diium dibromide
Ali, Basem F.; Al-Far, Rawhi; Haddad, Salim F.; Acta Crystallographica Section E 68 (2012) o3033–; doi:10.1107/S1600536812040214

data_2236287
_publ_section_title
;
 Redetermination of 2,2'-bipyridine-1,1'-diium dibromide
;
_journal_coeditor_code           HB6957
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3033
_journal_paper_doi               10.1107/S1600536812040214
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C10 H10 N2 2+, 2Br -'
_chemical_formula_moiety         'C10 H10 N2 2+, 2(Br -)'
_chemical_formula_sum            'C10 H10 Br2 N2'
_chemical_formula_weight         318.00
_chemical_name_common
;
2-(Pyridin-1-ium-2-yl)pyridin-1-ium dibromide
;
_chemical_name_systematic
;
2,2'-Bipyridine-1,1'-diium; dibromide
;
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.830(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.5568(6)
_cell_length_b                   9.7747(7)
_cell_length_c                   15.3533(12)
_cell_measurement_reflns_used    1832
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.1346
_cell_measurement_theta_min      2.9110
_cell_volume                     1128.21(15)
_computing_cell_refinement       'CrysAlis PRO (Agilent, 2011)'
_computing_data_collection       'CrysAlis PRO (Agilent, 2011)'
_computing_data_reduction        'CrysAlis PRO (Agilent, 2011)'
_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 16.0534
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Agilent Xcalibur EOS'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) x-ray source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0317
_diffrn_reflns_av_sigmaI/netI    0.0494
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            5425
_diffrn_reflns_theta_full        29.20
_diffrn_reflns_theta_max         29.20
_diffrn_reflns_theta_min         3.42
_diffrn_standards_decay_%        0.00
_exptl_absorpt_coefficient_mu    7.148
_exptl_absorpt_correction_T_max  0.489
_exptl_absorpt_correction_T_min  0.287
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrysAlis PRO; Agilent, 2011)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.872
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.498
_refine_diff_density_min         -0.566
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         3054
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0650
_refine_ls_R_factor_gt           0.0369
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0250P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0646
_refine_ls_wR_factor_ref         0.0729
_reflns_number_gt                1884
_reflns_number_total             3054
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb6957.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2236287
_cod_database_fobs_code          2236287