Electrocatalytic Hydrogen Evolution at Low Overpotentials by Cobalt Macrocyclic Glyoxime and Tetraimine Complexes
Xile Hu; Bruce S. Brunschwig; Jonas C. Peters; Journal of the American Chemical Society 129 (2007) 8988–8998; doi:10.1021/ja067876b

data_4109674
_publ_section_title
;
 Electrocatalytic Hydrogen Evolution at Low Overpotentials by Cobalt
 Macrocyclic Glyoxime and Tetraimine Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8988
_journal_page_last               8998
_journal_paper_doi               10.1021/ja067876b
_journal_volume                  129
_journal_year                    2007
_chemical_formula_sum            'C34 H30 B2 Cl4 Co F4 N6 O4'
_chemical_formula_weight         884.99
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 91.535(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.8460(4)
_cell_length_b                   25.7081(13)
_cell_length_c                   15.1519(6)
_cell_measurement_temperature    100(2)
_cell_volume                     3833.9(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.906
_diffrn_measured_fraction_theta_max 0.906
_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  0.1185
_diffrn_reflns_av_sigmaI/netI    0.1177
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -34
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            18190
_diffrn_reflns_theta_full        28.23
_diffrn_reflns_theta_max         28.23
_diffrn_reflns_theta_min         1.58
_exptl_absorpt_coefficient_mu    0.793
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.533
_exptl_crystal_F_000             1796
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         1.643
_refine_diff_density_min         -1.356
_refine_diff_density_rms         0.111
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.316
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     251
_refine_ls_number_reflns         4305
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.316
_refine_ls_R_factor_all          0.1344
_refine_ls_R_factor_gt           0.0619
_refine_ls_shift/su_max          0.029
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0901
_refine_ls_wR_factor_ref         0.1009
_reflns_number_gt                2263
_reflns_number_total             4305
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja067876bsi20070502_125837_1.cif
_cod_data_source_block           d:\xh02\xh02
_cod_database_code               4109674