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_4109977
_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            'C55 H115 N3 O19 W5 Zr'
_chemical_formula_weight         2132.97
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                   23.8193(11)
_cell_length_b                   17.1071(8)
_cell_length_c                   17.2814(8)
_cell_measurement_reflns_used    9654
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.63
_cell_measurement_theta_min      2.32
_cell_volume                     7041.8(6)
_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      150(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  'silicon 111'
_diffrn_radiation_source         'Daresbury SRS station 9.8'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.6934
_diffrn_reflns_av_R_equivalents  0.0867
_diffrn_reflns_av_sigmaI/netI    0.0494
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            34974
_diffrn_reflns_theta_full        22.66
_diffrn_reflns_theta_max         22.66
_diffrn_reflns_theta_min         1.67
_diffrn_standards_decay_%        20
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    8.342
_exptl_absorpt_correction_T_max  0.85
_exptl_absorpt_correction_T_min  0.43
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.012
_exptl_crystal_description       plate
_exptl_crystal_F_000             4112
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.02
_refine_diff_density_max         3.018
_refine_diff_density_min         -5.021
_refine_diff_density_rms         0.308
_refine_ls_extinction_coef       0.00011(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.344
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     416
_refine_ls_number_reflns         5245
_refine_ls_number_restraints     283
_refine_ls_restrained_S_all      1.312
_refine_ls_R_factor_all          0.1098
_refine_ls_R_factor_gt           0.0995
_refine_ls_shift/su_max          0.022
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+660.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2147
_refine_ls_wR_factor_ref         0.2178
_reflns_number_gt                4510
_reflns_number_total             5245
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja0725495si20070418_010810_5.cif
_cod_data_source_block           rje313_anion5
_cod_database_code               4109977