Nitrile-functionalized pyridinium, pyrrolidinium, and piperidinium ionic liquids.
Lethesh, Kallidanthiyil Chellappan; Van Hecke, Kristof; Van Meervelt, Luc; Nockemann, Peter; Kirchner, Barbara; Zahn, Stefan; Parac-Vogt, Tatjana N; Dehaen, Wim; Binnemans, Koen; The journal of physical chemistry. B 115 (2011) 8424–8438; doi:10.1021/jp2027675

data_1501714
_publ_section_title
;
 Nitrile-functionalized pyridinium, pyrrolidinium, and piperidinium ionic
 liquids.
;
_journal_issue                   26
_journal_name_full               'The journal of physical chemistry. B'
_journal_page_first              8424
_journal_page_last               8438
_journal_paper_doi               10.1021/jp2027675
_journal_volume                  115
_journal_year                    2011
_chemical_formula_moiety         'C8 H9 N2, C2 F6 N O4 S2'
_chemical_formula_sum            'C10 H9 F6 N3 O4 S2'
_chemical_formula_weight         413.34
_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                 106.36(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.687(4)
_cell_length_b                   8.186(3)
_cell_length_c                   15.537(6)
_cell_measurement_temperature    100(2)
_cell_volume                     1548.3(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_publication_material  Platon
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'SMART 6000'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'crossed G\"obel mirrors'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0756
_diffrn_reflns_av_sigmaI/netI    0.0551
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            25000
_diffrn_reflns_theta_full        71.49
_diffrn_reflns_theta_max         71.49
_diffrn_reflns_theta_min         3.99
_exptl_absorpt_coefficient_mu    4.022
_exptl_absorpt_correction_T_max  0.447
_exptl_absorpt_correction_T_min  0.309
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.773
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             832
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.480
_refine_diff_density_min         -0.265
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         2981
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0422
_refine_ls_R_factor_gt           0.0366
_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^)+(0.0185P)^2^+1.4139P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0838
_refine_ls_wR_factor_ref         0.0872
_reflns_number_gt                2655
_reflns_number_total             2981
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp2027675_si_006.cif
_cod_data_source_block           wg225
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1501714