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_7126713
_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            'C42 H48 Co N'
_chemical_formula_weight         625.74
_chemical_name_systematic        6
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_IT_number           60
_space_group_name_Hall           '-P 2n 2ab'
_space_group_name_H-M_alt        'P b c n'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P b c n'
_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                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.6058(7)
_cell_length_b                   14.6784(7)
_cell_length_c                   30.7441(13)
_cell_measurement_reflns_used    6261
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.69
_cell_measurement_theta_min      1.92
_cell_volume                     6591.2(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.1289
_diffrn_reflns_av_sigmaI/netI    0.0683
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       37
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            68527
_diffrn_reflns_theta_full        25.69
_diffrn_reflns_theta_max         25.69
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    0.551
_exptl_absorpt_correction_T_max  0.9836
_exptl_absorpt_correction_T_min  0.9219
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.261
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             2672
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: hexane'
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.336
_refine_diff_density_min         -0.404
_refine_diff_density_rms         0.068
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.962
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     416
_refine_ls_number_reflns         6261
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.962
_refine_ls_R_factor_all          0.0978
_refine_ls_R_factor_gt           0.0474
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0514P)^2^+5.7518P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0984
_refine_ls_wR_factor_ref         0.1189
_reflns_number_gt                3998
_reflns_number_total             6261
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d0cc03028g2.cif
_cod_data_source_block           sg794
_cod_depositor_comments
'Adding full bibliography for 7126711--7126714.cif.'
_cod_original_sg_symbol_H-M      Pbcn
_cod_database_code               7126713