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_4304090
_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 Br3.40 Cl 2.60 Cu2 N4'
_chemical_formula_sum            'C24 H20 Br3.4 Cl2.6 Cu2 N4'
_chemical_formula_weight         855.38
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                67.604(2)
_cell_angle_beta                 83.355(2)
_cell_angle_gamma                67.630(2)
_cell_formula_units_Z            1
_cell_length_a                   8.2536(8)
_cell_length_b                   9.5607(9)
_cell_length_c                   9.8568(10)
_cell_measurement_reflns_used    679
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      20.97
_cell_measurement_theta_min      2.24
_cell_volume                     664.63(11)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        'SAINT (Bruker, 2002)'
_computing_molecular_graphics    'SHELXTL (Bruker, 2002)'
_computing_publication_material  'SHELXTL (Bruker, 2002)'
_computing_structure_refinement  'SHELXTL (Bruker, 2002)'
_computing_structure_solution    'SHELXTL (Bruker, 2002)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0919
_diffrn_reflns_av_sigmaI/netI    0.1762
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            5982
_diffrn_reflns_theta_full        27.87
_diffrn_reflns_theta_max         27.87
_diffrn_reflns_theta_min         2.24
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  430
_diffrn_standards_number         682
_exptl_absorpt_coefficient_mu    6.995
_exptl_absorpt_correction_T_max  0.7672
_exptl_absorpt_correction_T_min  0.3658
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2002)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    2.137
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             413
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.968
_refine_diff_density_min         -0.955
_refine_diff_density_rms         0.303
_refine_ls_extinction_coef       0.0046(18)
_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   0.860
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     184
_refine_ls_number_reflns         3147
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      0.859
_refine_ls_R_factor_all          0.1041
_refine_ls_R_factor_gt           0.0456
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0796P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0976
_refine_ls_wR_factor_ref         0.1783
_reflns_number_gt                1628
_reflns_number_total             3147
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic7014786-file003_7.cif
_cod_data_source_block           9
_cod_original_formula_sum        'C24 H20 Br3.40 Cl2.60 Cu2 N4'
_cod_database_code               4304090