Structural and spectroscopic elucidation of imidazolium and pyridinium based hexachloridophosphates and niobates
Gjikaj, Mimoza; Leye, Johann-Christian; Xie, Tao; Brockner, Wolfgang; CrystEngComm 12 (2010) 1474–; doi:10.1039/b919368e

data_7212073
_publ_section_title
;
 Structural and spectroscopic elucidation of imidazolium and pyridinium
 based hexachloridophosphates and niobates
;
_journal_issue                   5
_journal_name_full               CrystEngComm
_journal_page_first              1474
_journal_paper_doi               10.1039/b919368e
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         '[C6N2H11][NbCl6]'
_chemical_formula_sum            'C6 H11 Cl6 N2 Nb'
_chemical_formula_weight         416.78
_chemical_name_common
;
1-ethyl-3-methylimidazolium hexachloridoniobate
;
_chemical_name_systematic
;
1-ethyl-3-methylimidazolium hexachloridoniobate
;
_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                 98.455(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   20.1861(14)
_cell_length_b                   7.0842(6)
_cell_length_c                   20.5488(13)
_cell_measurement_reflns_used    30748
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.90
_cell_measurement_theta_min      0.984
_cell_volume                     2906.6(4)
_computing_cell_refinement       'Stoe X-Area'
_computing_data_collection       'Stoe X-Area'
_computing_data_reduction        'Stoe X-Area'
_computing_molecular_graphics    'DIAMOND (Brandenburger, 1999)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'STOE IPDS 2'
_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  0.0645
_diffrn_reflns_av_sigmaI/netI    0.0412
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            29506
_diffrn_reflns_theta_full        29.90
_diffrn_reflns_theta_max         29.90
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    1.903
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.905
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1632
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.883
_refine_diff_density_min         -0.520
_refine_diff_density_rms         0.089
_refine_ls_extinction_coef       0.0263(4)
_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   1.092
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     360
_refine_ls_number_reflns         8256
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0387
_refine_ls_R_factor_gt           0.0316
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0239P)^2^+2.0660P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0728
_refine_ls_wR_factor_ref         0.0766
_reflns_number_gt                7250
_reflns_number_total             8256
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b919368e.txt
_cod_data_source_block           C6H11Cl6N2Nb
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7212073