One electron reduction transforms high-valent low-spin cobalt alkylidene into high-spin cobalt(ii) carbene radical.
Grass, Amanda; Bellow, James A.; Morrison, Gregory; Zur Loye, Hans-Conrad; Lord, Richard L.; Groysman, Stanislav; Chemical communications (Cambridge, England) 56 (2020) 8416–8419; doi:10.1039/d0cc03028g

data_7126714
_publ_section_title
;
 One electron reduction transforms high-valent low-spin cobalt alkylidene
 into high-spin cobalt(ii) carbene radical.
;
_journal_issue                   60
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              8416
_journal_page_last               8419
_journal_paper_doi               10.1039/d0cc03028g
_journal_volume                  56
_journal_year                    2020
_chemical_formula_sum            'C72 H72 Co2 N8'
_chemical_formula_weight         1167.24
_chemical_name_systematic        5
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2020-04-03 deposited with the CCDC.	2020-06-17 downloaded from the CCDC.
;
_cell_angle_alpha                98.389(3)
_cell_angle_beta                 99.020(3)
_cell_angle_gamma                113.189(3)
_cell_formula_units_Z            2
_cell_length_a                   12.0255(6)
_cell_length_b                   13.8796(7)
_cell_length_c                   21.0959(10)
_cell_measurement_reflns_used    13863
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.56
_cell_measurement_theta_min      1.00
_cell_volume                     3111.9(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 0.964
_diffrn_measured_fraction_theta_max 0.964
_diffrn_measurement_device_type  'Bruker Apex2'
_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  0.0769
_diffrn_reflns_av_sigmaI/netI    0.1049
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            59463
_diffrn_reflns_theta_full        27.56
_diffrn_reflns_theta_max         27.56
_diffrn_reflns_theta_min         1.00
_exptl_absorpt_coefficient_mu    0.582
_exptl_absorpt_correction_T_max  0.9604
_exptl_absorpt_correction_T_min  0.9178
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.246
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1228
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: hexane'
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.576
_refine_diff_density_min         -0.470
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     755
_refine_ls_number_reflns         13863
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.1138
_refine_ls_R_factor_gt           0.0505
_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^)+(0.0443P)^2^+0.2508P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0924
_refine_ls_wR_factor_ref         0.1109
_reflns_number_gt                8337
_reflns_number_total             13863
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d0cc03028g2.cif
_cod_data_source_block           sg796_0m
_cod_depositor_comments
'Adding full bibliography for 7126711--7126714.cif.'
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7126714