Cobalt(II) "Scorpionate" Complexes as Models for Cobalt-Substituted Zinc Enzymes: Electronic Structure Investigation by High-Frequency and -Field Electron Paramagnetic Resonance Spectroscopy
J. Krzystek; Dale C. Swenson; S. A. Zvyagin; Dmitry Smirnov; Andrew Ozarowski; Joshua Telser; Journal of the American Chemical Society 132 (2010) 5241–5253; doi:10.1021/ja910766w

data_4102270
_publ_section_title
;
 Cobalt(II) "Scorpionate" Complexes as Models for Cobalt-Substituted Zinc
 Enzymes: Electronic Structure Investigation by High-Frequency and -Field
 Electron Paramagnetic Resonance Spectroscopy
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              5241
_journal_page_last               5253
_journal_paper_doi               10.1021/ja910766w
_journal_volume                  132
_journal_year                    2010
_chemical_formula_moiety         'C24 H40 B Cl Co N6'
_chemical_formula_sum            'C24 H40 B Cl Co N6'
_chemical_formula_weight         517.81
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           160
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'R 3 -2"'
_symmetry_space_group_name_H-M   'R 3 m :H'
_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                120.00
_cell_formula_units_Z            3
_cell_length_a                   15.9843(17)
_cell_length_b                   15.9843(17)
_cell_length_c                   9.4269(10)
_cell_measurement_reflns_used    2665
_cell_measurement_temperature    190(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1.0
_cell_volume                     2085.9(4)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo, Scalepack (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL v6.1 (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL v6.1 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXTL v6.1 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXTL v6.1 (Sheldrick, 1997)'
_diffrn_ambient_temperature      190(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       'CCD 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  0.0354
_diffrn_reflns_av_sigmaI/netI    0.0233
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            9505
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.65
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.735
_exptl_absorpt_correction_T_max  0.9642
_exptl_absorpt_correction_T_min  0.8095
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'HKL Scalepack (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.237
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             825
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.182
_refine_diff_density_min         -0.221
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.442(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.087
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     70
_refine_ls_number_reflns         1175
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0246
_refine_ls_R_factor_gt           0.0231
_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^)+(0.0297P)^2^+0.7201P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0552
_refine_ls_wR_factor_ref         0.0560
_reflns_number_gt                1148
_reflns_number_total             1175
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja910766w_si_002_5.cif
_cod_data_source_block           Tp(t-Bu)(Me)CoCl
_cod_original_sg_symbol_Hall     ' R 3 -2" '
_cod_original_sg_symbol_H-M      'R 3 m'
_cod_database_code               4102270