Halogen Exchange and Scrambling between C-X and M-X' Bonds in Copper, Nickel, and Cobalt Complexes of 6,6'-bis(bromo/ chloromethyl)-2,2'-bipyridine. Structural, Electrochemical, and Photochemical Studies
Meenakshi Ghosh; Papu Biswas; Ulrich Flörke; Kamalaksha Nag; Inorganic Chemistry 47 (2008) 281–296; doi:10.1021/ic7014786

data_4304084
_publ_section_title
;
Halogen Exchange and Scrambling between C-X and M-X' Bonds in Copper,
Nickel, and Cobalt Complexes of 6,6'-bis(bromo/
chloromethyl)-2,2'-bipyridine. Structural, Electrochemical, and
Photochemical Studies
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              281
_journal_page_last               296
_journal_paper_doi               10.1021/ic7014786
_journal_volume                  47
_journal_year                    2008
_chemical_formula_moiety         '(C24 H20 Br4 Cu N4)(Cl O4)'
_chemical_formula_sum            'C24 H20 Br4 Cl Cu N4 O4'
_chemical_formula_weight         847.07
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 99.757(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.6503(7)
_cell_length_b                   13.2877(7)
_cell_length_c                   15.8870(9)
_cell_measurement_reflns_used    4499
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.28
_cell_measurement_theta_min      2.38
_cell_volume                     2839.9(3)
_computing_cell_refinement       'Bruker (2002) SMART'
_computing_data_collection       'Bruker (2002) SMART'
_computing_data_reduction        'Bruker (2002) SAINT'
_computing_molecular_graphics    'Bruker (2002) SHELXTL'
_computing_publication_material  'Bruker (2002) SHELXTL'
_computing_structure_refinement  'Bruker (2002) SHELXTL'
_computing_structure_solution    'Bruker (2002) SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker AXS SMART APEX'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0309
_diffrn_reflns_av_sigmaI/netI    0.0391
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            18820
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         1.82
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  430
_diffrn_standards_number         4528
_exptl_absorpt_coefficient_mu    6.529
_exptl_absorpt_correction_T_max  0.471
_exptl_absorpt_correction_T_min  0.293
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2002)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.981
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1640
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.625
_refine_diff_density_min         -0.583
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     343
_refine_ls_number_reflns         5787
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0479
_refine_ls_R_factor_gt           0.0339
_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^)+(0.0305P)^2^+2.5316P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0765
_refine_ls_wR_factor_ref         0.0811
_reflns_number_gt                4571
_reflns_number_total             5787
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic7014786-file003_1.cif
_cod_data_source_block           1a
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4304084