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_1545698
_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         'C28 H20 Co4 F12 N4 O12'
_chemical_formula_sum            'C28 H20 Co4 F12 N4 O12'
_chemical_formula_weight         1068.20
_chemical_name_common            ain834
_space_group_crystal_system      cubic
_space_group_IT_number           220
_space_group_name_Hall           'I -4bd 2c 3'
_space_group_name_H-M_alt        'I -4 3 d'
_symmetry_space_group_name_Hall  'I -4bd 2c 3'
_symmetry_space_group_name_H-M   'I -4 3 d'
_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            12
_cell_length_a                   22.0726(4)
_cell_length_b                   22.0726(4)
_cell_length_c                   22.0726(4)
_cell_measurement_reflns_used    9936
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.32
_cell_measurement_theta_min      2.26
_cell_volume                     10753.8(3)
_computing_cell_refinement       'Bruker APEX2'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker APEX2'
_computing_molecular_graphics    ORTEP-32
_computing_publication_material  WinGX
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick 2014)'
_computing_structure_solution    'SHELXT-2014/4 (Sheldrick 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 1.000
_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  0.0409
_diffrn_reflns_av_unetI/netI     0.0138
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            53832
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         26.461
_diffrn_reflns_theta_min         2.260
_diffrn_source                   'microfocus sealed tube'
_exptl_absorpt_coefficient_mu    1.948
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.6824
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.979
_exptl_crystal_description       pyramidal
_exptl_crystal_F_000             6336
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.192
_refine_diff_density_min         -0.175
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details
; 
 Flack x determined using 811 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.015(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.108
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         1847
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.126
_refine_ls_R_factor_all          0.0208
_refine_ls_R_factor_gt           0.0198
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0162P)^2^+16.0965P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0451
_refine_ls_wR_factor_ref         0.0456
_reflns_Friedel_coverage         0.847
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.993
_reflns_number_gt                1803
_reflns_number_total             1847
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7sc00627f2.cif
_cod_data_source_block           shelx
_cod_original_cell_volume        10753.8(6)
_cod_database_code               1545698
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.829
_shelx_estimated_absorpt_t_max   0.829
_shelx_res_checksum              6013