Synthetic Control and Empirical Prediction of Redox Potentials for Co4O4 Cubanes over a 1.4 V Range: Implications for Catalyst Design and Evaluation of High-Valent Intermediates in Water Oxidation
Nguyen, Andy Ich; Wang, Jianing; Levine, Daniel S.; Ziegler, Micah S.; Tilley, T. Don; Chem. Sci.  (2017) –; doi:10.1039/C7SC00627F

data_1545699
_publ_section_title
;
 Synthetic Control and Empirical Prediction of Redox Potentials for Co4O4
 Cubanes over a 1.4 V Range: Implications for Catalyst Design and
 Evaluation of High-Valent Intermediates in Water Oxidation
;
_journal_name_full               'Chem. Sci.'
_journal_paper_doi               10.1039/C7SC00627F
_journal_year                    2017
_chemical_formula_moiety         'C40 H36 Co4 N8 O8, 2(C5 H5 N)'
_chemical_formula_sum            'C50 H46 Co4 N10 O8'
_chemical_formula_weight         1150.69
_chemical_name_common            ain875
_space_group_crystal_system      tetragonal
_space_group_IT_number           114
_space_group_name_Hall           'P -4 2n'
_space_group_name_H-M_alt        'P -4 21 c'
_symmetry_space_group_name_Hall  'P -4 2n'
_symmetry_space_group_name_H-M   'P -4 21 c'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-02-10 deposited with the CCDC.
2017-04-04 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   11.6403(3)
_cell_length_b                   11.6403(3)
_cell_length_c                   17.0402(6)
_cell_measurement_reflns_used    8580
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.71
_cell_measurement_theta_min      2.39
_cell_volume                     2308.89(12)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    ORTEP-32
_computing_publication_material  WinGX
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick 2014)'
_computing_structure_solution    SIR-92
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0224
_diffrn_reflns_av_unetI/netI     0.0249
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            8576
_diffrn_reflns_point_group_measured_fraction_full 0.965
_diffrn_reflns_point_group_measured_fraction_max 0.964
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.706
_diffrn_reflns_theta_min         2.119
_diffrn_source                   'microfocus sealed tube'
_exptl_absorpt_coefficient_mu    1.481
_exptl_absorpt_correction_T_max  0.7453
_exptl_absorpt_correction_T_min  0.6543
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.655
_exptl_crystal_description       block
_exptl_crystal_F_000             1176
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.446
_refine_diff_density_min         -0.257
_refine_diff_density_rms         0.054
_refine_ls_abs_structure_details
; 
 Flack x determined using 794 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.002(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         2126
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.0233
_refine_ls_R_factor_gt           0.0219
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0241P)^2^+1.3367P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0577
_refine_ls_wR_factor_ref         0.0585
_reflns_Friedel_coverage         0.693
_reflns_Friedel_fraction_full    0.919
_reflns_Friedel_fraction_max     0.918
_reflns_number_gt                2031
_reflns_number_total             2126
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7sc00627f2.cif
_cod_data_source_block           shelx
_cod_original_cell_volume        2308.89(14)
_cod_database_code               1545699
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.866
_shelx_estimated_absorpt_t_max   0.866
_shelx_res_checksum              8726