3,3'-Dibenzyl-1,1'-ethylenediimidazolium dibromide
Lee, Hon Man; Cheng, Pi-Yun; Acta Crystallographica Section E 66 (2010) o2308–; doi:10.1107/S1600536810031934

data_2227866
_publ_section_title
;
 3,3'-Dibenzyl-1,1'-ethylenediimidazolium dibromide
;
_journal_coeditor_code           OM2353
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2308
_journal_paper_doi               10.1107/S1600536810031934
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C22 H24 N4 2+, 2Br -'
_chemical_formula_moiety         'C22 H24 N4 2+, 2(Br -)'
_chemical_formula_sum            'C22 H24 Br2 N4'
_chemical_formula_weight         504.27
_chemical_name_systematic
;
3,3'-Dibenzyl-1,1'-ethylenediimidazolium 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                 96.495(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   16.4674(8)
_cell_length_b                   5.2099(2)
_cell_length_c                   12.3736(6)
_cell_measurement_reflns_used    2242
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      24.5
_cell_measurement_theta_min      2.5
_cell_volume                     1054.76(8)
_computing_cell_refinement       'SAINT (Bruker, 2007)'
_computing_data_collection       'APEX2 (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'DIAMOND (Brandenburg, 2006)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART APEXII'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0474
_diffrn_reflns_av_sigmaI/netI    0.0521
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            10232
_diffrn_reflns_theta_full        27.97
_diffrn_reflns_theta_max         27.97
_diffrn_reflns_theta_min         2.49
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.858
_exptl_absorpt_correction_T_max  0.5125
_exptl_absorpt_correction_T_min  0.4455
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.588
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             508
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.487
_refine_diff_density_min         -0.458
_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         2542
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0529
_refine_ls_R_factor_gt           0.0314
_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^)+(0.0338P)^2^+0.0060P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0679
_refine_ls_wR_factor_ref         0.0738
_reflns_number_gt                1915
_reflns_number_total             2542
_reflns_threshold_expression     I>2\s
_cod_data_source_file            om2353.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2227866
_cod_database_fobs_code          2227866