Bis(trichlorophosphine)iminium salts, [Cl~3~P=N=PCl~3~]^+^, with transition metal halide counter-ions
Rivard, Eric; McWilliams, Andrew R.; Lough, Alan J.; Manners, Ian; Acta Crystallographica Section C 58 (2002) i114–i118; doi:10.1107/S0108270102012532

data_2012953
_publ_section_title
;
 Bis(trichlorophosphine)iminium salts, [Cl~3~P=N=PCl~3~]^+^, with
 transition metal halide counter-ions
;
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              i114
_journal_page_last               i118
_journal_paper_doi               10.1107/S0108270102012532
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          '(Cl6 N P2) [Nb Cl6]'
_chemical_formula_moiety         'Cl6 N P2 1+, Cl6 Nb 1-'
_chemical_formula_sum            'Cl12 N Nb P2'
_chemical_formula_weight         594.26
_chemical_name_systematic
;
Bis(trichlorophosphino)iminium hexachloroniobate
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   none
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 103.928(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.4095(7)
_cell_length_b                   8.5268(6)
_cell_length_c                   15.0432(9)
_cell_measurement_reflns_used    17033
_cell_measurement_temperature    150.0(10)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.5
_cell_volume                     1669.47(18)
_computing_cell_refinement       'DENZO--SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius BV, 2001)'
_computing_data_reduction        DENZO--SMN
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1999)'
_diffrn_ambient_temperature      150.0(10)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f scans and \w scans with \k offsets'
_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  0.029
_diffrn_reflns_av_sigmaI/netI    0.0421
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            6672
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.79
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.805
_exptl_absorpt_correction_T_max  0.568
_exptl_absorpt_correction_T_min  0.531
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(DENZO--SMN; Otwinowski & Minor, 1997)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.364
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1128
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.946
_refine_diff_density_min         -0.784
_refine_ls_extinction_coef       0.0010(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     76
_refine_ls_number_reflns         1908
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.083
_refine_ls_R_factor_all          0.0380
_refine_ls_R_factor_gt           0.0312
_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^)+(0.0358P)^2^+2.7251P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0773
_refine_ls_wR_factor_ref         0.0818
_reflns_number_gt                1676
_reflns_number_total             1908
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1570.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2012953
_cod_database_fobs_code          2012953