Selenium as a Structural Surrogate of Sulfur: Template-Assisted Assembly of Five Types of Tungsten-Iron-Sulfur/Selenium Clusters and the Structural Fate of Chalcogenide Reactants
Bo Zheng; Xu-Dong Chen; Shao-Liang Zheng; R. H. Holm; Journal of the American Chemical Society 134 (2012) 6479–6490; doi:10.1021/ja3010539

data_4117799
_publ_section_title
;
 Selenium as a Structural Surrogate of Sulfur: Template-Assisted Assembly
 of Five Types of Tungsten-Iron-Sulfur/Selenium Clusters and the
 Structural Fate of Chalcogenide Reactants
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6479
_journal_page_last               6490
_journal_paper_doi               10.1021/ja3010539
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C53.5 H101.5 B2 Fe4 N16.5 O2.5 S9 W2'
_chemical_formula_weight         1917.27
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yac'
_symmetry_space_group_name_H-M   'P 1 2/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                 91.281(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.431(6)
_cell_length_b                   10.277(3)
_cell_length_c                   37.268(11)
_cell_measurement_reflns_used    3689
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      20.5
_cell_measurement_theta_min      2.2
_cell_volume                     7823(4)
_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(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.1920
_diffrn_reflns_av_sigmaI/netI    0.1388
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -44
_diffrn_reflns_number            73574
_diffrn_reflns_theta_full        25.06
_diffrn_reflns_theta_max         25.06
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    3.939
_exptl_absorpt_correction_T_max  0.8910
_exptl_absorpt_correction_T_min  0.4051
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.628
_exptl_crystal_description       needle
_exptl_crystal_F_000             3856
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.968
_refine_diff_density_min         -1.560
_refine_diff_density_rms         0.199
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.008
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     836
_refine_ls_number_reflns         13849
_refine_ls_number_restraints     109
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.1561
_refine_ls_R_factor_gt           0.0703
_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^)+(0.0740P)^2^+50.4156P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1525
_refine_ls_wR_factor_ref         0.1937
_reflns_number_gt                7212
_reflns_number_total             13849
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja3010539_si_001_11.cif
_cod_data_source_block           compound13
_cod_original_formula_sum        'C53.50 H101.50 B2 Fe4 N16.50 O2.50 S9 W2'
_cod_database_code               4117799