Rearrangement of Symmetrical Dicubane Clusters into Topological Analogues of the P Cluster of Nitrogenase: Nature's Choice?
Yugen Zhang; Jing-Lin Zuo; Hong-Cai Zhou; R. H. Holm; Journal of the American Chemical Society 124 (2002) 14292–14293; doi:10.1021/ja0279702

data_4115353
_publ_section_title
;
 Rearrangement of Symmetrical Dicubane Clusters into Topological Analogues
 of the P Cluster of Nitrogenase: Nature's Choice?
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14292
_journal_page_last               14293
_journal_paper_doi               10.1021/ja0279702
_journal_volume                  124
_journal_year                    2002
_chemical_formula_moiety         '[Tp2Mo2Fe6S8(P(Et)3)4]'
_chemical_formula_sum            'C42 H80 B2 Fe6 Mo2 N12 P4 S8'
_chemical_formula_weight         1680.12
_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                 112.7430(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.2863(9)
_cell_length_b                   25.2819(18)
_cell_length_c                   12.8320(9)
_cell_measurement_temperature    293(2)
_cell_volume                     3376.8(4)
_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      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0399
_diffrn_reflns_av_sigmaI/netI    0.0380
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            14099
_diffrn_reflns_theta_full        22.50
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         1.61
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    1.990
_exptl_absorpt_correction_T_max  0.820
_exptl_absorpt_correction_T_min  0.626
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.635
_exptl_crystal_density_meas      ?
_exptl_crystal_description       plate
_exptl_crystal_F_000             1668
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.808
_refine_diff_density_min         -0.586
_refine_diff_density_rms         0.097
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         4425
_refine_ls_number_restraints     9
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0752
_refine_ls_R_factor_gt           0.0496
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0594P)^2^+13.9075P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1223
_refine_ls_wR_factor_ref         0.1403
_reflns_number_gt                3234
_reflns_number_total             4425
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0279702_s1_2.cif
_cod_data_source_block           '[Tp2Mo2Fe6S8(P(Et)3)4]'
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_database_code               4115353