Solid-State Structures of Double-Long-Chain Imidazolium Ionic Liquids: Influence of Anion Shape on Cation Geometry and Crystal Packing
Wang, Xinjiao; Vogel, Carola S.; Heinemann, Frank W.; Wasserscheid, Peter; Meyer, Karsten; Crystal Growth & Design 11 (2011) 1974–; doi:10.1021/cg200169u

data_4500713
_publ_section_title
;
 Solid-State Structures of Double-Long-Chain Imidazolium Ionic Liquids:
 Influence of Anion Shape on Cation Geometry and Crystal Packing
;
_journal_issue                   5
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1974
_journal_paper_doi               10.1021/cg200169u
_journal_volume                  11
_journal_year                    2011
_chemical_formula_moiety         'C27 H53 N2, C2 N3'
_chemical_formula_sum            'C29 H53 N5'
_chemical_formula_weight         471.76
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                101.009(3)
_cell_angle_beta                 98.259(6)
_cell_angle_gamma                91.545(6)
_cell_formula_units_Z            2
_cell_length_a                   7.2671(4)
_cell_length_b                   10.1060(7)
_cell_length_c                   20.7305(7)
_cell_measurement_reflns_used    53
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      20.0
_cell_measurement_theta_min      6.0
_cell_volume                     1476.64(14)
_computing_cell_refinement       'EVALCCD (Duisenberg, 2003)'
_computing_data_collection       'COLLECT (Bruker-Nonius, 2002)'
_computing_data_reduction        'EVALCCD (Duisenberg, 2003)'
_computing_molecular_graphics    'SHELXTL 6.12 (Bruker AXS, 2002)'
_computing_publication_material  'SHELXTL 6.12 (Bruker AXS, 2002)'
_computing_structure_refinement  'SHELXTL 6.12 (Bruker AXS, 2002)'
_computing_structure_solution    'SHELXTL 6.12 (Bruker AXS, 2002)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD'
_diffrn_measurement_method
;
 \f- and \w-rotations with 1.70 \% and 204 sec per frame
;
_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  0.0474
_diffrn_reflns_av_sigmaI/netI    0.0305
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            41886
_diffrn_reflns_theta_full        27.10
_diffrn_reflns_theta_max         27.10
_diffrn_reflns_theta_min         3.15
_exptl_absorpt_coefficient_mu    0.063
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.853
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker-AXS, 2002'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.061
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             524
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.252
_refine_diff_density_min         -0.204
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         6504
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0636
_refine_ls_R_factor_gt           0.0424
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0494P)^2^+0.3571P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1026
_refine_ls_wR_factor_ref         0.1122
_reflns_number_gt                4908
_reflns_number_total             6504
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg200169u_si_004.cif
_cod_data_source_block           xw1004
_cod_original_sg_symbol_Hall     -P1
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4500713