3,3'-Di-<i>n</i>-propyl-1,1'-[<i>p</i>-phenylenebis(methylene)]diimidazolium dibromide
Haque, Rosenani A.; Nasri, S. Fatimah; Hemamalini, Madhukar; Fun, Hoong-Kun; Acta Crystallographica Section E 67 (2011) o1931–; doi:10.1107/S1600536811026146

data_2231203
_publ_section_title
;
 3,3'-Di-<i>n</i>-propyl-1,1'-[<i>p</i>-phenylenebis(methylene)]diimidazolium
 dibromide
;
_journal_coeditor_code           LH5273
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1931
_journal_paper_doi               10.1107/S1600536811026146
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C20 H28 N4 2+, 2Br -'
_chemical_formula_moiety         'C20 H28 N4 2+, 2(Br -)'
_chemical_formula_sum            'C20 H28 Br2 N4'
_chemical_formula_weight         484.28
_chemical_name_systematic
;
3,3'-Di-<i>n</i>-propyl-1,1'-[<i>p</i>-phenylenebis(methylene)]diimidazolium
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                 109.7160(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.9420(2)
_cell_length_b                   11.2443(2)
_cell_length_c                   11.3536(2)
_cell_measurement_reflns_used    4287
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      29.75
_cell_measurement_theta_min      2.42
_cell_volume                     1074.64(4)
_computing_cell_refinement       'SAINT (Bruker, 2009)'
_computing_data_collection       'APEX2 (Bruker, 2009)'
_computing_data_reduction        'SAINT (Bruker, 2009)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
'SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type
;
Bruker SMART APEXII CCD area-detector
;
_diffrn_measurement_method       '\f and \w scans'
_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  0.0298
_diffrn_reflns_av_sigmaI/netI    0.0278
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            11799
_diffrn_reflns_theta_full        30.09
_diffrn_reflns_theta_max         30.09
_diffrn_reflns_theta_min         2.42
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.783
_exptl_absorpt_correction_T_max  0.3966
_exptl_absorpt_correction_T_min  0.3381
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.497
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             492
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.304
_refine_diff_density_min         -0.588
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     118
_refine_ls_number_reflns         3127
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0455
_refine_ls_R_factor_gt           0.0301
_refine_ls_shift/su_max_lt       0.001
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0366P)^2^+0.2340P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0717
_refine_ls_wR_factor_ref         0.0775
_reflns_number_gt                2409
_reflns_number_total             3127
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh5273.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2231203
_cod_database_fobs_code          2231203