Testing the Polynuclear Hypothesis: Multielectron Reduction of Small Molecules by Triiron Reaction Sites
Tamara M. Powers; Theodore A. Betley; Journal of the American Chemical Society 135 (2013) 12289–12296; doi:10.1021/ja405057n

data_4120320
_publ_contact_author_address
;
Department of Chemistry and Chemical Biology
Harvard University
Mallinckrodt 306E
12 Oxford Street
Cambridge, MA 02138
;
_publ_contact_author_email       betley@chemistry.harvard.edu
_publ_contact_author_name        'Professor Theodore A. Betley'
_publ_contact_author_phone       617-496-9944
_publ_section_title
;
 Testing the Polynuclear Hypothesis: Multielectron Reduction of Small
 Molecules by Triiron Reaction Sites
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12289
_journal_page_last               12296
_journal_paper_doi               10.1021/ja405057n
_journal_volume                  135
_journal_year                    2013
_chemical_formula_sum            'C131 H205 Fe6 N16 Si6'
_chemical_formula_weight         2507.75
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                96.398(2)
_cell_angle_beta                 108.873(2)
_cell_angle_gamma                100.447(2)
_cell_formula_units_Z            2
_cell_length_a                   15.2814(14)
_cell_length_b                   21.682(2)
_cell_length_c                   22.529(2)
_cell_measurement_reflns_used    9937
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      25.59
_cell_measurement_theta_min      2.32
_cell_volume                     6829.1(11)
_computing_cell_refinement       'SAINT 7.46A (Bruker-AXS, 2009)'
_computing_data_collection       'APEX2 v2009.3.0 (Bruker-AXS, 2009)'
_computing_data_reduction        'SAINT 7.46A (Bruker-AXS, 2009)'
_computing_molecular_graphics    'Bruker SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'Bruker SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(1)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type
;
Bruker D8 goniometer with 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  0.1294
_diffrn_reflns_av_sigmaI/netI    0.1382
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            108290
_diffrn_reflns_theta_full        25.79
_diffrn_reflns_theta_max         25.79
_diffrn_reflns_theta_min         1.24
_exptl_absorpt_coefficient_mu    0.725
_exptl_absorpt_correction_T_max  0.9443
_exptl_absorpt_correction_T_min  0.8339
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008')'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.220
_exptl_crystal_description       plate
_exptl_crystal_F_000             2686
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.302
_refine_diff_density_min         -0.457
_refine_diff_density_rms         0.093
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1500
_refine_ls_number_reflns         26099
_refine_ls_number_restraints     127
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.1492
_refine_ls_R_factor_gt           0.0643
_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^)+(0.0726P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1444
_refine_ls_wR_factor_ref         0.1784
_reflns_number_gt                13655
_reflns_number_total             26099
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja405057n_si_002_3.cif
_cod_data_source_block           Fe3_NPh_2
_cod_database_code               4120320