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_7126711
_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            'C31.5 H43 Co O'
_chemical_formula_weight         496.59
_chemical_name_systematic        3a
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_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
_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                 101.414(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   19.276(7)
_cell_length_b                   15.481(6)
_cell_length_c                   20.600(8)
_cell_measurement_reflns_used    4430
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      23.49
_cell_measurement_theta_min      1.87
_cell_volume                     6026(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.1761
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            4430
_diffrn_reflns_theta_full        23.49
_diffrn_reflns_theta_max         23.49
_diffrn_reflns_theta_min         1.87
_exptl_absorpt_coefficient_mu    0.588
_exptl_absorpt_correction_T_max  0.9883
_exptl_absorpt_correction_T_min  0.9435
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.095
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             2136
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: hexane'
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.051
_refine_diff_density_min         -0.606
_refine_diff_density_rms         0.142
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.976
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         4430
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.976
_refine_ls_R_factor_all          0.1766
_refine_ls_R_factor_gt           0.1046
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1654P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2671
_refine_ls_wR_factor_ref         0.2958
_reflns_number_gt                2109
_reflns_number_total             4430
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d0cc03028g2.cif
_cod_data_source_block           sg781_0m_sq
_cod_depositor_comments
'Adding full bibliography for 7126711--7126714.cif.'
_cod_original_sg_symbol_H-M      C2/c
_cod_original_formula_sum        'C31.50 H43 Co O'
_cod_database_code               7126711