Ligand Effects on the Ferro- to Antiferromagnetic Exchange Ratio in Bis(o-Semiquinonato)copper(II)
Victor I. Ovcharenko; Elena V. Gorelik; Sergey V. Fokin; Galina V. Romanenko; Vladimir N. Ikorskii; Anna V. Krashilina; Vladimir K. Cherkasov; Gleb A. Abakumov; Journal of the American Chemical Society 129 (2007) 10512–10521; doi:10.1021/ja072463b

data_4109821
_publ_section_title
;
 Ligand Effects on the Ferro- to Antiferromagnetic Exchange Ratio in
 Bis(o-Semiquinonato)copper(II)
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10512
_journal_page_last               10521
_journal_paper_doi               10.1021/ja072463b
_journal_volume                  129
_journal_year                    2007
_chemical_formula_moiety         'Cu(C10 H10 O2)2 (C4 H6 N2)'
_chemical_formula_sum            'C44 H64 Cu2 N8 O4'
_chemical_formula_weight         896.11
_chemical_name_systematic
; 
 [bis(3,6-di-tert-butyl-catechalato)(1-methylimidazole))copper(II)]
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.1324(7)
_cell_length_b                   17.6776(17)
_cell_length_c                   18.2915(17)
_cell_measurement_reflns_used    4644
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      22.77
_cell_measurement_theta_min      2.23
_cell_volume                     2306.3(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0394
_diffrn_reflns_av_sigmaI/netI    0.0317
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            17685
_diffrn_reflns_theta_full        23.33
_diffrn_reflns_theta_max         23.33
_diffrn_reflns_theta_min         2.23
_exptl_absorpt_coefficient_mu    0.971
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.290
_exptl_crystal_description       plate
_exptl_crystal_F_000             948
_refine_diff_density_max         0.356
_refine_diff_density_min         -0.192
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.007(15)
_refine_ls_extinction_coef       0.0000(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.955
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     391
_refine_ls_number_reflns         3323
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.955
_refine_ls_R_factor_all          0.0356
_refine_ls_R_factor_gt           0.0328
_refine_ls_shift/su_max          6.289
_refine_ls_shift/su_mean         0.023
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0644P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0824
_refine_ls_wR_factor_ref         0.0847
_reflns_number_gt                3121
_reflns_number_total             3323
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja072463bsi20070522_080040_7.cif
_cod_data_source_block           f291s
_cod_database_code               4109821