Synthesis and Reactivity of the Methoxozirconium Pentatungstate (nBu4N)6[{(μ-MeO)ZrW5O18}2]: Insights into Proton-Transfer Reactions, Solution Dynamics, and Assembly of {ZrW5O18}2- Building Blocks
R. John Errington; Sagar S. Petkar; Paul S. Middleton; William McFarlane; William Clegg; Robert A. Coxall; Ross W. Harrington; Journal of the American Chemical Society 129 (2007) 12181–12196; doi:10.1021/ja0725495

data_4109980
_publ_section_title
;
 Synthesis and Reactivity of the Methoxozirconium Pentatungstate
 (nBu4N)6[{(\m-MeO)ZrW5O18}2]: Insights into Proton-Transfer Reactions,
 Solution Dynamics, and Assembly of {ZrW5O18}2- Building Blocks
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12181
_journal_page_last               12196
_journal_paper_doi               10.1021/ja0725495
_journal_volume                  129
_journal_year                    2007
_chemical_formula_sum            'C50 H111 N3 O20 W5 Zr'
_chemical_formula_weight         2084.89
_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                 90.33(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.857(3)
_cell_length_b                   23.723(5)
_cell_length_c                   18.663(4)
_cell_measurement_reflns_used    9172
_cell_measurement_temperature    160(2)
_cell_measurement_theta_max      28.57
_cell_measurement_theta_min      2.18
_cell_volume                     7020(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      160(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART 1K CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0410
_diffrn_reflns_av_sigmaI/netI    0.0339
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            40689
_diffrn_reflns_theta_full        22.50
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         0.86
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    8.365
_exptl_absorpt_correction_T_max  0.680
_exptl_absorpt_correction_T_min  0.044
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.973
_exptl_crystal_description       block
_exptl_crystal_F_000             4008
_exptl_crystal_size_max          1.00
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.05
_refine_diff_density_max         1.686
_refine_diff_density_min         -1.457
_refine_diff_density_rms         0.139
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     788
_refine_ls_number_reflns         9172
_refine_ls_number_restraints     682
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.0526
_refine_ls_R_factor_gt           0.0348
_refine_ls_shift/su_max          5.860
_refine_ls_shift/su_mean         0.055
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0185P)^2^+80.8724P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0740
_refine_ls_wR_factor_ref         0.0847
_reflns_number_gt                7252
_reflns_number_total             9172
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja0725495si20070418_010810_8.cif
_cod_data_source_block           rje288_anion8
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4109980