Observation of Ferromagnetic Exchange, Spin Crossover, Reductively Induced Oxidation, and Field-Induced Slow Magnetic Relaxation in Monomeric Cobalt Nitroxides
Ian A. Gass; Subrata Tewary; Ayman Nafady; Nicholas F. Chilton; Christopher J. Gartshore; Mousa Asadi; David W. Lupton; Boujemaa Moubaraki; Alan M. Bond; John F. Boas; Si-Xuan Guo; Gopalan Rajaraman; Keith S. Murray; Inorganic Chemistry 52 (2013) 7557–7572; doi:10.1021/ic400565h

data_4335348
_publ_contact_author_address
; School of Chemistry, 171 
  Monash university, 
  Vic 3800, 
  Australia
;
_publ_contact_author_email       Keith.murray@sci.monash.edu.au
_publ_contact_author_fax         +61-3-9905-4597
_publ_contact_author_name        'Keith. S. Murray'
_publ_contact_author_phone       +61-3-9905-4512
_publ_section_title
;
 Observation of Ferromagnetic Exchange, Spin Crossover, Reductively
 Induced Oxidation, and Field-Induced Slow Magnetic Relaxation in
 Monomeric Cobalt Nitroxides
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              7557
_journal_page_last               7572
_journal_paper_doi               10.1021/ic400565h
_journal_volume                  52
_journal_year                    2013
_chemical_formula_moiety
;
C30 H32 Co N6 O4, 2(N O3)
;
_chemical_formula_sum            'C30 H32 Co N8 O10'
_chemical_formula_weight         723.57
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             '9 November 2005'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 101.421(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.3825(10)
_cell_length_b                   14.1324(17)
_cell_length_c                   11.7395(15)
_cell_measurement_reflns_used    1624
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      24.66
_cell_measurement_theta_min      2.88
_cell_volume                     1525.8(3)
_computing_cell_refinement       'Bruker Apex2 V2.0'
_computing_data_collection       'Bruker Apex2 V2.0'
_computing_data_reduction        'Bruker Apex2 V2.0'
_computing_molecular_graphics    X-SEED
_computing_publication_material  'XCIF V6.12 (BrukerAXS, 2001).'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'APEX X8'
_diffrn_measurement_method       'scans in phi and omega'
_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  0.0535
_diffrn_reflns_av_sigmaI/netI    0.0711
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9372
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.64
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.637
_exptl_absorpt_correction_T_max  0.909
_exptl_absorpt_correction_T_min  0.892
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.575
_exptl_crystal_description       block
_exptl_crystal_F_000             750
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.925
_refine_diff_density_min         -0.516
_refine_diff_density_rms         0.099
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.015
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     225
_refine_ls_number_reflns         3483
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.0945
_refine_ls_R_factor_gt           0.0665
_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^)+(0.0981P)^2^+2.4345P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1749
_refine_ls_wR_factor_ref         0.1925
_reflns_number_gt                2499
_reflns_number_total             3483
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic400565h_si_001_1.cif
_cod_data_source_block           complex1123K
_cod_database_code               4335348