Unusual mixed valent FeIIIFeII complex (St = 3/2) stabilised by a reduced bulky 1,2-diketone.
Spikes, Geoffrey H; Bill, Eckhard; Weyhermüller, Thomas; Wieghardt, Karl; Chemical communications (Cambridge, England)  (2007) 4339–4341; doi:10.1039/b713062g

data_7102242
_publ_section_title
;
 Unusual mixed valent FeIIIFeII complex (St = 3/2) stabilised by a
 reduced bulky 1,2-diketone.
;
_journal_issue                   42
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4339
_journal_page_last               4341
_journal_paper_doi               10.1039/b713062g
_journal_year                    2007
_chemical_formula_moiety         'C26 H34 O2'
_chemical_formula_sum            'C26 H34 O2'
_chemical_formula_weight         378.53
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            4
_cell_length_a                   9.6205(3)
_cell_length_b                   13.8569(5)
_cell_length_c                   16.7988(6)
_cell_measurement_temperature    100(2)
_cell_volume                     2239.45(13)
_computing_cell_refinement       'Bruker AXS Collect Software'
_computing_data_collection       'Bruker AXS Collect Software'
_computing_data_reduction        'Bruker AXS Collect Software'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker-Nonius Kappa-CCD'
_diffrn_measurement_method
'244 images at 2.0 deg stepwise rotation in omega and phi, 180 sec./frame'
_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  0.0658
_diffrn_reflns_av_sigmaI/netI    0.0301
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            23895
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.22
_exptl_absorpt_coefficient_mu    0.069
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.123
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'transparent block'
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.326
_refine_diff_density_min         -0.230
_refine_diff_density_rms         0.039
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     131
_refine_ls_number_reflns         2561
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0579
_refine_ls_R_factor_gt           0.0426
_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^)+(0.0457P)^2^+0.8133P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1010
_refine_ls_wR_factor_ref         0.1065
_reflns_number_gt                2031
_reflns_number_total             2561
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b713062g.txt
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               7102242