Structural Conversions of Molybdenum-Iron-Sulfur Edge-Bridged Double Cubanes and PN-Type Clusters Topologically Related to the Nitrogenase P-Cluster
Yugen Zhang; R. H. Holm; Inorganic Chemistry 43 (2004) 674–682; doi:10.1021/ic030259t

data_4310384
_publ_section_title
;
 Structural Conversions of Molybdenum-Iron-Sulfur Edge-Bridged Double
 Cubanes and PN-Type Clusters Topologically Related to the Nitrogenase
 P-Cluster
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              674
_journal_page_last               682
_journal_paper_doi               10.1021/ic030259t
_journal_volume                  43
_journal_year                    2004
_chemical_formula_moiety         (Et4N)2[Tp2Mo2Fe6S8Br4](C4H10O)
_chemical_formula_sum            'C42 H80 B2 Br4 Fe6 Mo2 N14 O2 S8'
_chemical_formula_weight         1937.80
_chemical_melting_point          ?
_chemical_name_systematic
;
  ?
;
_space_group_IT_number           55
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2 2ab'
_symmetry_space_group_name_H-M   'P b a m'
_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            2
_cell_length_a                   15.359(3)
_cell_length_b                   19.810(4)
_cell_length_c                   11.806(2)
_cell_measurement_temperature    193(2)
_cell_volume                     3592.1(12)
_computing_cell_refinement       'Bruker Smart'
_computing_data_collection       'Bruker Smart'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scan'
_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  0.0532
_diffrn_reflns_av_sigmaI/netI    0.0405
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            25172
_diffrn_reflns_theta_full        28.29
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         1.68
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    4.009
_exptl_absorpt_correction_T_max  0.67
_exptl_absorpt_correction_T_min  0.47
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            'dark green '
_exptl_crystal_density_diffrn    1.783
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1844
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.800
_refine_diff_density_min         -1.026
_refine_diff_density_rms         0.143
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     256
_refine_ls_number_reflns         4664
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.067
_refine_ls_R_factor_all          0.0705
_refine_ls_R_factor_gt           0.0419
_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^)+(0.0553P)^2^+2.2443P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0976
_refine_ls_wR_factor_ref         0.1095
_reflns_number_gt                3338
_reflns_number_total             4664
_reflns_threshold_expression     2sigma(I)
_cod_data_source_file            ic030259t_09.cif
_cod_data_source_block           (Et4N)2[Tp2Mo2Fe6S8Br4](C4H10O)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value ' not measured ' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1569 2011-02-09 13:29:24Z adriana 

The following automatic conversions were performed:

'_symmetry_cell_setting' tag value 'orthrhombic' was replaced with
'orthorhombic' value.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_cell_volume        3592.0(12)
_cod_database_code               4310384