Poly[nickel(II)-di-μ-4,4'-bipyridyl-κ^4^<i>N</i>:<i>N</i>'-μ-dichromato-κ^2^<i>O</i>:<i>O</i>'] and poly[copper(II)-di-μ-4,4'-bipyridyl-κ^4^<i>N</i>:<i>N</i>'-μ-dichromato-κ^2^<i>O</i>:<i>O</i>']
Amy L. Kopf; Paul A. Maggard; Charlotte L. Stern; Kenneth R. Poeppelmeier; Acta Crystallographica Section C 61 (2005) m165–m168; doi:10.1107/S0108270105001605

data_2014839
_publ_section_title
;Poly[nickel(II)-di-\m-4,4'-bipyridyl-\k^4^<i>N</i>:<i>N</i>'-\m-dichromato-\k^2^<i>O</i>:<i>O</i>']
 and
 poly[copper(II)-di-\m-4,4'-bipyridyl-\k^4^<i>N</i>:<i>N</i>'-\m-dichromato-\k^2^<i>O</i>:<i>O</i>']
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              m165
_journal_page_last               m168
_journal_paper_doi               10.1107/S0108270105001605
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          '[Cu (C10 H8 N2)2 (Cr2 O7)]'
_chemical_formula_moiety         'C20 H16 Cr2 Cu N4 O7'
_chemical_formula_structural     '[Cu (C10 H8 N2)2 (Cr2 O7)]'
_chemical_formula_sum            'C20 H16 Cr2 Cu N4 O7'
_chemical_formula_weight         591.91
_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           'SHELXL97 (Sheldrick, 1997)'
_cell_angle_alpha                90.00
_cell_angle_beta                 125.682(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   21.603(3)
_cell_length_b                   14.8505(18)
_cell_length_c                   16.604(2)
_cell_measurement_reflns_used    5221
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      28
_cell_measurement_theta_min      4
_cell_volume                     4326.8(10)
_computing_cell_refinement       'SAINT-Plus (Siemens, 1996)'
_computing_data_collection       'SMART-NT (Siemens, 1996)'
_computing_data_reduction        SAINT-Plus
_computing_molecular_graphics    'ATOMS (Dowty, 1999)'
_computing_publication_material  'program (reference)?'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.971
_diffrn_measurement_device_type  'Bruker SMART AXS'
_diffrn_measurement_method       \w--2\q
_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  0.0262
_diffrn_reflns_av_sigmaI/netI    0.0202
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            19193
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.80
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.013
_exptl_absorpt_correction_T_max  0.8159
_exptl_absorpt_correction_T_min  0.7692
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details   'face indexed'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.817
_exptl_crystal_density_meas      1.828(5)
_exptl_crystal_density_method    'flotation pycnometry'
_exptl_crystal_description       Cube
_exptl_crystal_F_000             2376
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.728
_refine_diff_density_min         -0.778
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         5221
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0365
_refine_ls_R_factor_gt           0.0308
_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^)+(0.0470P)^2^+7.1233P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0810
_refine_ls_wR_factor_ref         0.0848
_reflns_number_gt                4526
_reflns_number_total             5221
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            gg1225.cif
_cod_data_source_block           II
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2014839