A Biomimetic Approach to Oxidized Sites in the Xanthine Oxidoreductase Family: Synthesis and Stereochemistry of Tungsten(VI) Analogue Complexes
Stanislav Groysman; Jun-Jieh Wang; Ranitendranath Tagore; Sonny C. Lee; Richard H. Holm; Journal of the American Chemical Society 130 (2008) 12794–12807; doi:10.1021/ja804000k

data_4108368
_publ_contact_author_address
;
      Department of Chemistry and Chemical Biology
      Harvard University
      12 Oxford Street
      Cambridge, MA 02138
      USA
;
_publ_contact_author_email       holm@chemistry.harvard.edu
_publ_contact_author_fax         '617 496-9289'
_publ_contact_author_name        'Richard H. Holm'
_publ_contact_author_phone       '617 495-0853'
_publ_section_title
;
 A Biomimetic Approach to Oxidized Sites in the Xanthine Oxidoreductase
 Family: Synthesis and Stereochemistry of Tungsten(VI) Analogue Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12794
_journal_page_last               12807
_journal_paper_doi               10.1021/ja804000k
_journal_volume                  130
_journal_year                    2008
_chemical_formula_sum            'C25 H51 N3 O2 S4 W'
_chemical_formula_weight         737.78
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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            4
_cell_length_a                   11.0172(7)
_cell_length_b                   14.7202(9)
_cell_length_c                   19.8810(12)
_cell_measurement_temperature    188(2)
_cell_volume                     3224.2(3)
_computing_cell_refinement       'SMART (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT (Bruker, 2003)'
_computing_molecular_graphics    'SHELXTL (Bruker, 2000)'
_computing_publication_material  'SHELXTL (Bruker, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      188(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Smart APEX CCD'
_diffrn_measurement_method       \w
_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  0.0247
_diffrn_reflns_av_sigmaI/netI    0.0290
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            15725
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.72
_exptl_absorpt_coefficient_mu    3.867
_exptl_absorpt_correction_T_max  0.6984
_exptl_absorpt_correction_T_min  0.3447
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2002)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.520
_exptl_crystal_description       blocks
_exptl_crystal_F_000             1504
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.802
_refine_diff_density_min         -0.310
_refine_diff_density_rms         0.067
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.037(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     326
_refine_ls_number_reflns         5668
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0254
_refine_ls_R_factor_gt           0.0230
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0247P)^2^+0.6290P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0500
_refine_ls_wR_factor_ref         0.0510
_reflns_number_gt                5375
_reflns_number_total             5668
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja804000k_si_001_4.cif
_cod_data_source_block           11
_cod_database_code               4108368