A Ferric Semiquinoid Single-Chain Magnet via Thermally-Switchable Metal-Ligand Electron Transfer.
DeGayner, Jordan A.; Wang, Kunyu; Harris, T. David; Journal of the American Chemical Society 140 (2018) 6550–6553; doi:10.1021/jacs.8b03949

data_4132440
_publ_section_title
;
 A Ferric Semiquinoid Single-Chain Magnet via Thermally-Switchable
 Metal-Ligand Electron Transfer.
;
_journal_issue                   21
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6550
_journal_page_last               6553
_journal_paper_doi               10.1021/jacs.8b03949
_journal_volume                  140
_journal_year                    2018
_chemical_formula_moiety         '0.5(C12 Cl8 Fe2 O8), 2(C4 H12 N)'
_chemical_formula_sum            'C14 H24 Cl4 Fe N2 O4'
_chemical_formula_weight         482.00
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-04-11
_audit_creation_method
;
Olex2 1.2
(compiled 2018.04.03 svn.r3497 for OlexSys, GUI svn.r5486)
;
_cell_angle_alpha                90
_cell_angle_beta                 104.871(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.183(3)
_cell_length_b                   9.4935(16)
_cell_length_c                   13.961(2)
_cell_measurement_reflns_used    2563
_cell_measurement_temperature    250
_cell_measurement_theta_max      34.22
_cell_measurement_theta_min      2.79
_cell_volume                     2073.0(6)
_computing_cell_refinement       'SAINT V8.34A (Bruker, 2013)'
_computing_data_collection       'APEX2 V2014.11-0 (Bruker, 2014)'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      250.08
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Bruker Kappa APEX CCD area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'QuazarTM optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0570
_diffrn_reflns_av_unetI/netI     0.0644
_diffrn_reflns_Laue_measured_fraction_full 0.987
_diffrn_reflns_Laue_measured_fraction_max 0.977
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            5682
_diffrn_reflns_point_group_measured_fraction_full 0.987
_diffrn_reflns_point_group_measured_fraction_max 0.977
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.461
_diffrn_reflns_theta_min         2.510
_diffrn_source                   microsource
_exptl_absorpt_coefficient_mu    1.263
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.4973
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction.'
_exptl_crystal_colour            'clear dark brown'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   dark
_exptl_crystal_colour_primary    brown
_exptl_crystal_density_diffrn    1.544
_exptl_crystal_description       plate
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.334
_exptl_crystal_size_mid          0.058
_exptl_crystal_size_min          0.042
_refine_diff_density_max         0.778
_refine_diff_density_min         -0.438
_refine_diff_density_rms         0.111
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     118
_refine_ls_number_reflns         1886
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0946
_refine_ls_R_factor_gt           0.0727
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0906P)^2^+17.8996P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1927
_refine_ls_wR_factor_ref         0.2055
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1371
_reflns_number_total             1886
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b03949_si_001.cif
_cod_data_source_block           nme4fecl2ca_250k
_cod_original_cell_volume        2073.1(6)
_cod_database_code               4132440
_shelx_shelxl_version_number     2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.5 times of:
  All C(H,H,H) groups
2.a Idealised Me refined as rotating group:
 C4(H4a,H4b,H4c), C5(H5a,H5b,H5c), C6(H6a,H6b,H6c), C7(H7a,H7b,H7c)
;
_olex2_submission_original_sample_id (NMe4)2LFeCl2_250K
_olex2_submission_special_instructions 'No special instructions were received'