Crystal Chemistry of the 4,4'-Dimethyl-2,2'bipyridine/Copper Bromide System
Roger D. Willett; George Pon; Callie Nagy; Inorganic Chemistry 40 (2001) 4342–4352; doi:10.1021/ic010229v

data_4320091
_publ_section_title
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 Crystal Chemistry of the 4,4'-Dimethyl-2,2'bipyridine/Copper Bromide
 System
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              4342
_journal_page_last               4352
_journal_paper_doi               10.1021/ic010229v
_journal_volume                  40
_journal_year                    2001
_chemical_formula_sum            'C12 H14 Br4 Cu2 N2'
_chemical_formula_weight         632.97
_chemical_name_systematic
;
  (4,4'-dimethyl-2,2'-bipyridine)dicopper(II)tetrabromide
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 110.686(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.3718(5)
_cell_length_b                   13.31890(10)
_cell_length_c                   7.4432(2)
_cell_measurement_reflns_used    1153
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      23.25
_cell_measurement_theta_min      1.98
_cell_volume                     1611.13(7)
_computing_cell_refinement       'Siemens SCANS'
_computing_data_collection       'Siemens SCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'CCD detector'
_diffrn_measurement_method       '\w scan'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.2516
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1153
_diffrn_reflns_theta_full        23.25
_diffrn_reflns_theta_max         23.25
_diffrn_reflns_theta_min         1.98
_diffrn_standards_interval_time  'beginning and end'
_diffrn_standards_number         50
_exptl_absorpt_coefficient_mu    12.549
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    2.610
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       multifaceted
_exptl_crystal_F_000             1192
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.15
_refine_diff_density_max         3.932
_refine_diff_density_min         -8.948
_refine_diff_density_rms         1.055
_refine_ls_extinction_coef       0.00000(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.118
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     93
_refine_ls_number_reflns         1153
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.118
_refine_ls_R_factor_all          0.1777
_refine_ls_R_factor_gt           0.0560
_refine_ls_shift/su_max          1.923
_refine_ls_shift/su_mean         0.026
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0901P)^2^+6.4068P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1288
_refine_ls_wR_factor_ref         0.1579
_reflns_number_gt                937
_reflns_number_total             1153
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic010229v_8.cif
_cod_data_source_block           compound7-280rdw-gpta'
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_cell_volume        1611.13(6)
_cod_database_code               4320091