Six- and eight-coordinate thio- and seleno-ether complexes of NbF5 and some comparisons with NbCl5 and NbBr5 adducts.
Jura, Marek; Levason, William; Ratnani, Raju; Reid, Gillian; Webster, Michael; Dalton transactions (Cambridge, England : 2003) 39 (2010) 883–891; doi:10.1039/b916336k

data_7024381
_publ_section_title
;
 Six- and eight-coordinate thio- and seleno-ether complexes of NbF5 and
 some comparisons with NbCl5 and NbBr5 adducts.
;
_journal_issue                   3
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              883
_journal_page_last               891
_journal_paper_doi               10.1039/b916336k
_journal_volume                  39
_journal_year                    2010
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C8 H20 F4 Nb S4 1+, F6 Nb 1-'
_chemical_formula_structural     '((C4 H10 S2)2 (Nb F4)) (Nb F6)'
_chemical_formula_sum            'C8 H20 F10 Nb2 S4'
_chemical_formula_weight         620.30
_chemical_name_common
;Tetrafluorobis(1,2-bis(methylthio)ethane-S,S')niobium(V)
hexafluoroniobate(V)
;
_chemical_name_systematic
;
Tetrafluorobis[1,2-bis(methylthio)ethane-S,S']niobium(V)
hexafluoroniobate(V)
;
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2009-02-19
_audit_creation_method           'SHELXL-97 + hand edit'
_cell_angle_alpha                90.00
_cell_angle_beta                 101.252(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.0661(10)
_cell_length_b                   26.321(2)
_cell_length_c                   10.7327(10)
_cell_measurement_reflns_used    19587
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     3897.2(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type
'Bruker-Nonius 95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  '10cm confocal mirrors'
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0366
_diffrn_reflns_av_sigmaI/netI    0.0433
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -34
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            23913
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         3.19
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.685
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8219
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'G.M. Sheldrick, (2007). SADABS. Version 2007/2. Bruker AXS Inc.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.114
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2432
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.04
_refine_diff_density_max         3.019
_refine_diff_density_min         -0.779
_refine_diff_density_rms         0.121
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.11(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     442
_refine_ls_number_reflns         8152
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0388
_refine_ls_R_factor_gt           0.0354
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0289P)^2^+25.1013P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0814
_refine_ls_wR_factor_ref         0.0838
_reflns_number_gt                7749
_reflns_number_total             8152
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            b916336k.txt
_cod_data_source_block           09mj08
_cod_original_cell_volume        3897.3(5)
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               7024381