Formation of Group 14 and 15 heteroatom derivatives of trinuclear [M3Se4(H2O)9]4+ (M = Mo, W) and the decreased reactivity of [W3S4(H2O)9]4+
Hernandez-Molina, Rita; Elsegood, Mark R. J.; Clegg, William; Sykes, A. G.; Journal of the Chemical Society, Dalton Transactions  (2001) 2173–; doi:10.1039/b101399h

data_7010635
_publ_section_title
;
 Formation of Group 14 and 15 heteroatom derivatives of trinuclear
 [M3Se4(H2O)9]4+ (M&#x2005;=&#x2005;Mo, W) and the decreased reactivity
 of [W3S4(H2O)9]4+
;
_journal_issue                   14
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              2173
_journal_paper_doi               10.1039/b101399h
_journal_year                    2001
_chemical_formula_sum            'C56 H108 As Mo6 O50 S8 Se8'
_chemical_formula_weight         3120.14
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   'geom for CH, free with restraints for OH'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 92.645(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.3516(11)
_cell_length_b                   34.072(3)
_cell_length_c                   11.9253(11)
_cell_measurement_reflns_used    19942
_cell_measurement_temperature    160(2)
_cell_measurement_theta_max      28.53
_cell_measurement_theta_min      2.39
_cell_volume                     5013.3(8)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      160(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.936
_diffrn_measurement_device_type  'Bruker SMART CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_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  0.0585
_diffrn_reflns_av_sigmaI/netI    0.0710
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       44
_diffrn_reflns_limit_k_min       -44
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            43190
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.50
_diffrn_reflns_theta_min         1.65
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.216
_exptl_absorpt_correction_T_max  0.920
_exptl_absorpt_correction_T_min  0.297
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    2.067
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             3058
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.202
_refine_diff_density_min         -0.873
_refine_diff_density_rms         0.144
_refine_ls_extinction_coef       0.00035(3)
_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   0.927
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     666
_refine_ls_number_reflns         11896
_refine_ls_number_restraints     403
_refine_ls_restrained_S_all      0.914
_refine_ls_R_factor_all          0.0631
_refine_ls_R_factor_gt           0.0360
_refine_ls_shift/su_max          0.018
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0344P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0712
_refine_ls_wR_factor_ref         0.0764
_reflns_number_gt                8351
_reflns_number_total             11896
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b101399h.txt
_cod_data_source_block           ags34
_cod_original_cell_volume        5013.4(8)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7010635