Accessibility and Selective Stabilization of the Principal Spin States of Iron by Pyridyl versus Phenolic Ketimines: Modulation of the 6A1←→2T2 Ground-State Transformation of the [FeN4O2]+ Chromophore
Musa S. Shongwe; Usama A. Al-Zaabi; Faizah Al-Mjeni; Carla S. Eribal; Ekkehard Sinn; Imaddin A. Al-Omari; Hussein H. Hamdeh; Dariusz Matoga; Harry Adams; Michael J. Morris; Arnold L. Rheingold; Eckhard Bill; David J. Sellmyer; Inorganic Chemistry 51 (2012) 8241–8253; doi:10.1021/ic300732r

data_4329824
_publ_section_title
;
 Accessibility and Selective Stabilization of the Principal Spin States of
 Iron by Pyridyl versus Phenolic Ketimines: Modulation of the
 6A1\\leftarrow\\rightarrow2T2 Ground-State Transformation of the
 [FeN4O2]+ Chromophore
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              8241
_journal_page_last               8253
_journal_paper_doi               10.1021/ic300732r
_journal_volume                  51
_journal_year                    2012
_chemical_formula_sum            'C18 H26 Cl2 Fe N6 O8'
_chemical_formula_weight         581.20
_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_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.654(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.7479(19)
_cell_length_b                   9.8664(12)
_cell_length_c                   15.2144(18)
_cell_measurement_reflns_used    980
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      19.17
_cell_measurement_theta_min      3.12
_cell_volume                     2352.4(5)
_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      150(2)
_diffrn_detector_area_resol_mean 100
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.932
_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  0.0705
_diffrn_reflns_av_sigmaI/netI    0.0794
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            26199
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.59
_diffrn_reflns_theta_min         1.30
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.926
_exptl_absorpt_correction_T_max  0.8293
_exptl_absorpt_correction_T_min  0.7436
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            BLACK
_exptl_crystal_density_diffrn    1.641
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             1200
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.953
_refine_diff_density_min         -0.781
_refine_diff_density_rms         0.101
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     314
_refine_ls_number_reflns         5611
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0969
_refine_ls_R_factor_gt           0.0553
_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^)+(0.0812P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1360
_refine_ls_wR_factor_ref         0.1527
_reflns_number_gt                3601
_reflns_number_total             5611
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic300732r_si_001_1.cif
_cod_data_source_block           '[Fe(apHen)2](ClO4)2'
_cod_database_code               4329824