The co-ordination chemistry of bis(2,2'-bipyrid-6'-yl)ketone with first row transition metals: the reversible interconversion of a mononuclear complex and a dinuclear hemiketal containing species.
Knight, James C.; Amoroso, Angelo J.; Edwards, Peter G.; Prabaharan, Ravi; Singh, Neha; Dalton transactions (Cambridge, England : 2003) 39 (2010) 8925–8936; doi:10.1039/c0dt00344a

data_7026326
_publ_section_title
;
 The co-ordination chemistry of bis(2,2'-bipyrid-6'-yl)ketone with first
 row transition metals: the reversible interconversion of a mononuclear
 complex and a dinuclear hemiketal containing species.
;
_journal_issue                   38
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              8925
_journal_page_last               8936
_journal_paper_doi               10.1039/c0dt00344a
_journal_volume                  39
_journal_year                    2010
_chemical_compound_source        'synthesised by authors'
_chemical_formula_moiety         'C21 H18 N4 Ni O3, 2(Cl O4)'
_chemical_formula_sum            'C21 H18 Cl2 N4 Ni O11'
_chemical_formula_weight         632.00
_chemical_name_common            aja0607
_chemical_name_systematic        'bisbipyketone nickel'
_space_group_IT_number           56
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      56
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.802(2)
_cell_length_b                   12.453(3)
_cell_length_c                   19.760(4)
_cell_measurement_reflns_used    8144
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      2.91
_cell_volume                     2412.0(9)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'X-Seed (Barbour, 2001)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'Dirdiff-99 (Beurskens, 1999)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0909
_diffrn_reflns_av_sigmaI/netI    0.0745
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            10140
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.93
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.097
_exptl_absorpt_correction_T_max  0.8982
_exptl_absorpt_correction_T_min  0.7711
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav (Blessing, 1995)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.740
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1288
_exptl_crystal_recrystallization_method
'slow diffusion of ether in acetonitrile'
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.380
_refine_diff_density_min         -0.512
_refine_diff_density_rms         0.091
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     180
_refine_ls_number_reflns         2755
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0715
_refine_ls_R_factor_gt           0.0465
_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^)+(0.0399P)^2^+1.3889P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0971
_refine_ls_wR_factor_ref         0.1059
_reflns_number_gt                2028
_reflns_number_total             2755
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00344a.txt
_cod_data_source_block           pccn
_cod_database_code               7026326