Modeling Carboxylate-Bridged Dinuclear Active Sites in Metalloenzymes Using a Novel Naphthyridine-Based Dinucleating Ligand
Chuan He; Stephen J. Lippard; Journal of the American Chemical Society 122 (2000) 184–185; doi:10.1021/ja993125g

data_4115869
_publ_section_title
;
 Modeling Carboxylate-Bridged Dinuclear Active Sites in Metalloenzymes
 Using a Novel Naphthyridine-Based Dinucleating Ligand
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              184
_journal_page_last               185
_journal_paper_doi               10.1021/ja993125g
_journal_volume                  122
_journal_year                    2000
_chemical_formula_sum            'C56 H68 Cl4 Co4 N16 O20'
_chemical_formula_weight         1662.78
_chemical_name_common            '[Co4(OH)4(BPAN)2](ClO4)4 (4.4CH3CN). '
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-I 2ya'
_symmetry_space_group_name_H-M   'I 1 2/a 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                 109.2070(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.6718(2)
_cell_length_b                   11.0720(2)
_cell_length_c                   26.8327(3)
_cell_measurement_temperature    188(2)
_cell_volume                     6921.78(16)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      188(2)
_diffrn_measured_fraction_theta_full 0.941
_diffrn_measured_fraction_theta_max 0.941
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0453
_diffrn_reflns_av_sigmaI/netI    0.0657
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            21452
_diffrn_reflns_theta_full        28.29
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         1.61
_exptl_absorpt_coefficient_mu    1.179
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Brown
_exptl_crystal_density_diffrn    1.596
_exptl_crystal_description       Block
_exptl_crystal_F_000             3408
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.991
_refine_diff_density_min         -0.694
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.107
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     459
_refine_ls_number_reflns         8092
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.107
_refine_ls_R_factor_all          0.0999
_refine_ls_R_factor_gt           0.0602
_refine_ls_shift/su_max          0.071
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1590
_refine_ls_wR_factor_ref         0.1769
_reflns_number_gt                5472
_reflns_number_total             8092
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja993125g_4.cif
_cod_data_source_block           '[Co4(OH)4(BPAN)2](ClO4)4'
_cod_database_code               4115869