Stabilization of 3:1 Site-Differentiated Cubane-Type Clusters in the [Fe4S4]1+ Core Oxidation State by Tertiary Phosphine Ligation: Synthesis, Core Structural Diversity, and S= 1/2 Ground States
Liang Deng; Amit Majumdar; Wayne Lo; R. H. Holm; Inorganic Chemistry 49 (2010) 11118–11126; doi:10.1021/ic101702b

data_4317184
_publ_contact_author_address
;Departemnt of Chemistry and Chemical Biology
12 Oxford Street
Cambridge, MA 02138
United States of America
;
_publ_contact_author_email       holm@chemistry.harvard.edu
_publ_contact_author_name        'Prof. Richard H. Holm'
_publ_section_title
;
 Stabilization of 3:1 Site-Differentiated Cubane-Type Clusters in the
 [Fe4S4]1+ Core Oxidation State by Tertiary Phosphine Ligation: Synthesis,
 Core Structural Diversity, and S= 1/2 Ground States
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              11118
_journal_page_last               11126
_journal_paper_doi               10.1021/ic101702b
_journal_volume                  49
_journal_year                    2010
_chemical_formula_moiety         '2(C33 H67 Fe4 P3 S4 Se Cl)'
_chemical_formula_sum            'C66 H134 Cl2 Fe8 P6 S8 Se2'
_chemical_formula_weight         2045.71
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 113.507(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.168(4)
_cell_length_b                   17.033(3)
_cell_length_c                   24.185(4)
_cell_measurement_reflns_used    9931
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.23
_cell_measurement_theta_min      2.19
_cell_volume                     9130(3)
_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'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_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  0.0776
_diffrn_reflns_av_sigmaI/netI    0.0715
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            105417
_diffrn_reflns_theta_full        25.76
_diffrn_reflns_theta_max         25.76
_diffrn_reflns_theta_min         0.92
_exptl_absorpt_coefficient_mu    2.412
_exptl_absorpt_correction_T_max  0.9422
_exptl_absorpt_correction_T_min  0.8889
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2005)'
_exptl_crystal_colour            Brown-black
_exptl_crystal_density_diffrn    1.489
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1058
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         2.077
_refine_diff_density_min         -1.797
_refine_diff_density_rms         0.181
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     796
_refine_ls_number_reflns         17254
_refine_ls_number_restraints     18
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0881
_refine_ls_R_factor_gt           0.0696
_refine_ls_shift/su_max          0.021
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1034P)^2^+35.2156P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1752
_refine_ls_wR_factor_ref         0.1906
_reflns_number_gt                14031
_reflns_number_total             17254
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic101702b_si_001_05.cif
_cod_data_source_block           AMFeS6
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_database_code               4317184