Trends in Metal-Biradical Exchange Interaction for First-Row MII(Nitronyl Nitroxide-Semiquinone) Complexes
David A. Shultz; Kira E. Vostrikova; Scot H. Bodnar; Hyun-Joo Koo; Myung-Hwan Whangbo; Martin L. Kirk; Ezra C. Depperman; Jeff W. Kampf; Journal of the American Chemical Society 125 (2003) 1607–1617; doi:10.1021/ja020715x

data_4113447
_publ_section_title
;
 Trends in Metal-Biradical Exchange Interaction for First-Row MII(Nitronyl
 Nitroxide-Semiquinone) Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1607
_journal_page_last               1617
_journal_paper_doi               10.1021/ja020715x
_journal_volume                  125
_journal_year                    2003
_chemical_formula_sum            'C56 H69 B N8 Ni O4'
_chemical_formula_weight         987.71
_chemical_name_systematic
;

  ?

;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                96.8010(10)
_cell_angle_beta                 107.5180(10)
_cell_angle_gamma                98.3350(10)
_cell_formula_units_Z            2
_cell_length_a                   12.1536(9)
_cell_length_b                   13.2557(10)
_cell_length_c                   17.3931(12)
_cell_measurement_reflns_used    6458
_cell_measurement_temperature    108(2)
_cell_measurement_theta_max      26.39
_cell_measurement_theta_min      2.99
_cell_volume                     2604.6(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      108(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0261
_diffrn_reflns_av_sigmaI/netI    0.0378
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            27464
_diffrn_reflns_theta_full        26.39
_diffrn_reflns_theta_max         26.39
_diffrn_reflns_theta_min         1.58
_exptl_absorpt_coefficient_mu    0.426
_exptl_absorpt_correction_T_max  0.949
_exptl_absorpt_correction_T_min  0.762
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing, Acta Cryst. (1995) A51 33-38.'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.259
_exptl_crystal_description       block
_exptl_crystal_F_000             1052
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.38
_refine_diff_density_max         0.520
_refine_diff_density_min         -0.305
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     907
_refine_ls_number_reflns         10563
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0459
_refine_ls_R_factor_gt           0.0322
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0460P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0787
_refine_ls_wR_factor_ref         0.0818
_reflns_number_gt                8338
_reflns_number_total             10563
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja020715x_6.cif
_cod_data_source_block           kv29lt[NN-SQNiTpCum,Me]
_cod_database_code               4113447