New Complexes of Chromium(III) Containing Organic π-Radical Ligands: An Experimental and Density Functional Theory Study
Mei Wang; Jason England; Thomas Weyhermüller; Swarna-Latha Kokatam; Christopher J. Pollock; Serena DeBeer; Jingmei Shen; Glenn P.A. Yap; Klaus H. Theopold; Karl Wieghardt; Inorganic Chemistry 52 (2013) 4472–4487; doi:10.1021/ic302743s

data_4334477
_publ_section_title
;
 New Complexes of Chromium(III) Containing Organic \p-Radical Ligands: An
 Experimental and Density Functional Theory Study
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              4472
_journal_page_last               4487
_journal_paper_doi               10.1021/ic302743s
_journal_volume                  52
_journal_year                    2013
_chemical_compound_source        diethyelether
_chemical_formula_moiety         'C20 H32 Cr N4 O4'
_chemical_formula_sum            'C20 H32 Cr N4 O4'
_chemical_formula_weight         444.50
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_block_code                WGT-WM-001-01
_audit_creation_date             2012-07-04
_cell_angle_alpha                90.00
_cell_angle_beta                 108.346(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.6230(12)
_cell_length_b                   16.838(2)
_cell_length_c                   14.639(2)
_cell_measurement_reflns_used    9870
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      32.1998
_cell_measurement_theta_min      2.4192
_cell_volume                     2251.4(5)
_computing_cell_refinement       'SAINT software (Bruker AXS, 2004)'
_computing_data_collection       'APEX2 (Bruker AXS, 2008)'
_computing_data_reduction        'SAINT software (Bruker AXS, 2004)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 66.67
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker-AXS Kappa Mach3 APEX-II'
_diffrn_measurement_method       'CCD \f- and \w-scans'
_diffrn_radiation_monochromator  'Incoatec Helios mirrors'
_diffrn_radiation_source         '0.2 x 2mm^2^ focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0261
_diffrn_reflns_av_sigmaI/netI    0.0138
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            70150
_diffrn_reflns_theta_full        32.25
_diffrn_reflns_theta_max         32.25
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    0.540
_exptl_absorpt_correction_T_max  0.97230
_exptl_absorpt_correction_T_min  0.84513
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details   'SADABS (Bruker AXS, 2008)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.311
_exptl_crystal_description       needle
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.496
_refine_diff_density_min         -0.431
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     268
_refine_ls_number_reflns         7968
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0327
_refine_ls_R_factor_gt           0.0275
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0394P)^2^+0.9774P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0759
_refine_ls_wR_factor_ref         0.0799
_reflns_number_gt                7038
_reflns_number_total             7968
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic302743s_si_002_2.cif
_cod_data_source_block           2
_cod_original_sg_symbol_Hall     '? -p 2yn'
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4334477