A lead‒halide ladder complex: <i>catena</i>-poly[bis(2,3-dimethylquinoxalinium) [[di-μ~2~-bromido-bis[dibromoplumbate(II)]]-di-μ~2~-bromido]]
Ali, Basem Fares; Al-Far, Rawhi; Haddad, Salim; Acta Crystallographica Section E 63 (2007) m1569–m1569; doi:10.1107/S1600536807021186

data_2213746
_publ_section_title
;
 A lead--halide ladder complex:
 <i>catena</i>-poly[bis(2,3-dimethylquinoxalinium)
 [[di-\m~2~-bromido-bis[dibromoplumbate(II)]]-di-\m~2~-bromido]]
;
_journal_coeditor_code           DN2167
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              m1569
_journal_page_last               m1569
_journal_paper_doi               10.1107/S1600536807021186
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          '(C10 H12 N2)2 '[Pb2 Br8]''
_chemical_formula_moiety         'C6 H12 N2 2+, Br4 Pb 2-'
_chemical_formula_sum            'C10 H12 Br4 N2 Pb'
_chemical_formula_weight         1374.04
_chemical_name_common            '[2,3-DMeQH2][PbBr4]'
_chemical_name_systematic
;
<i>catena</i>-poly[bis(2,3-dimethylquinoxalinium)
[[di-\m~2~-bromido-bis[dibromoplumbate(II)]]-di-\m~2~-bromido]]
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 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                 101.83(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.4180(19)
_cell_length_b                   28.141(6)
_cell_length_c                   6.0290(12)
_cell_measurement_reflns_used    3034
_cell_measurement_temperature    295
_cell_measurement_theta_max      27.8764
_cell_measurement_theta_min      1.4452
_cell_volume                     1563.9(6)
_computing_cell_refinement       CrystalClear
_computing_data_collection       'CrystalClear (Rigaku, 2000)'
_computing_data_reduction        CrystalClear
_computing_molecular_graphics    'SHELXTL (Bruker, 1999)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      295(2)
_diffrn_detector_area_resol_mean 14.6306
_diffrn_measured_fraction_theta_full 0.977
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Rigaku Mercury CCD'
_diffrn_measurement_method       dtintegrate.ref
_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  0.092
_diffrn_reflns_av_sigmaI/netI    0.117
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -33
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            7780
_diffrn_reflns_theta_full        25.24
_diffrn_reflns_theta_max         25.24
_diffrn_reflns_theta_min         3.10
_diffrn_standards_decay_%        0.00
_exptl_absorpt_coefficient_mu    20.988
_exptl_absorpt_correction_T_max  0.2280
_exptl_absorpt_correction_T_min  0.1021
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   '(SHAPE Tracing Software; Rigaku, 2000)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    2.918
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1232
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         2.303
_refine_diff_density_min         -1.460
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.731
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     81
_refine_ls_number_reflns         1419
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.731
_refine_ls_R_factor_all          0.0732
_refine_ls_R_factor_gt           0.0544
_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^)+(0.0005P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1170
_refine_ls_wR_factor_ref         0.1233
_reflns_number_gt                875
_reflns_number_total             1419
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            dn2167.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'C 2/m'
_cod_database_code               2213746
_cod_database_fobs_code          2213746