A New Spin on Cyclooctatetraene (COT) Redox Activity: Low-Spin Iron(I) Complexes That Exhibit Antiferromagnetic Coupling to a Singly Reduced η4-COT Ligand
Mukhopadhyay, Tufan K.; Flores, Marco; Feller, Russell K.; Scott, Brian L.; Taylor, R. Dean; Paz-Pasternak, Moshe; Henson, Neil J.; Rein, Francisca N.; Smythe, Nathan C.; Trovitch, Ryan J.; Gordon, John C.; Organometallics 33 (2014) 7101–; doi:10.1021/om500909h

data_4084907
_publ_section_title
;
 A New Spin on Cyclooctatetraene (COT) Redox Activity: Low-Spin Iron(I)
 Complexes That Exhibit Antiferromagnetic Coupling to a Singly Reduced
 \h4-COT Ligand
;
_journal_issue                   24
_journal_name_full               Organometallics
_journal_page_first              7101
_journal_paper_doi               10.1021/om500909h
_journal_volume                  33
_journal_year                    2014
_chemical_formula_moiety         'C68 H66 Fe P6'
_chemical_formula_sum            'C68 H66 Fe P6'
_chemical_formula_weight         1124.87
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_cell_angle_alpha                90
_cell_angle_beta                 93.4300(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.8705(5)
_cell_length_b                   28.4738(13)
_cell_length_c                   20.7566(10)
_cell_measurement_reflns_used    4185
_cell_measurement_temperature    293.(2)
_cell_measurement_theta_max      22.1414
_cell_measurement_theta_min      2.3468
_cell_volume                     5823.2(5)
_computing_cell_refinement       'SAINT V8.32B (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker Instrument Service v2010.9.0.0'
_computing_data_reduction        'SAINT V8.32B (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'XShell ver. 6.3.1 (Bruker AXS, 2004)'
_computing_publication_material  'Bruker APEX2 v1013.6-2 (Bruker-AXS, 2013)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      293.(2)
_diffrn_detector_area_resol_mean 8.3330
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker Smart APEX'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0763
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -34
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            48641
_diffrn_reflns_theta_full        25.34
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         1.74
_diffrn_source_type              'sealed tube'
_exptl_absorpt_coefficient_mu    0.465
_exptl_absorpt_correction_T_max  0.96
_exptl_absorpt_correction_T_min  0.87
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2012/1 (Bruker AXS Inc.)'
_exptl_crystal_colour            'clear dark red'
_exptl_crystal_density_diffrn    1.283
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             2360
_exptl_crystal_size_max          0.279
_exptl_crystal_size_mid          0.114
_exptl_crystal_size_min          0.088
_refine_diff_density_max         0.332
_refine_diff_density_min         -0.308
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     676
_refine_ls_number_reflns         10651
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0852
_refine_ls_R_factor_gt           0.0453
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0393P)^2^+0.9885P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0889
_refine_ls_wR_factor_ref         0.1027
_reflns_number_gt                6978
_reflns_number_total             10651
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            om500909h_si_002.cif
_cod_data_source_block           Triphos2Fe
_cod_depositor_comments
'Adding full bibliography for 4084905--4084907.cif.'
_cod_database_code               4084907
_shelx_res_checksum              97058
_shelx_hkl_checksum              4563