Conformational Flexibility and Cation‒Anion Interactions in 1-Butyl-2,3-dimethylimidazolium Salts
Laus, Gerhard; Bentivoglio, Gino; Kahlenberg, Volker; Wurst, Klaus; Nauer, Gerhard; Schottenberger, Herwig; Tanaka, Masato; Siehl, Hans-Ullrich; Crystal Growth & Design 12 (2012) 1838–; doi:10.1021/cg201424m

data_4505894
_publ_section_title
;
 Conformational Flexibility and Cation--Anion Interactions in
 1-Butyl-2,3-dimethylimidazolium Salts
;
_journal_issue                   4
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1838
_journal_paper_doi               10.1021/cg201424m
_journal_volume                  12
_journal_year                    2012
_chemical_formula_moiety         '2(C9 H17 N2), Ce Cl6'
_chemical_formula_sum            'C18 H34 Ce Cl6 N4'
_chemical_formula_weight         659.31
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.000
_cell_angle_beta                 92.127(5)
_cell_angle_gamma                90.000
_cell_formula_units_Z            4
_cell_length_a                   10.071(5)
_cell_length_b                   15.568(5)
_cell_length_c                   17.737(5)
_cell_measurement_reflns_used    11901
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.2
_cell_measurement_theta_min      1.7
_cell_volume                     2779.0(18)
_computing_cell_refinement       X-AREA
_computing_data_collection       'X-AREA (Stoe & Cie, 2002)'
_computing_data_reduction        'X-RED32 (Stoe & Cie, 2002)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.964
_diffrn_measured_fraction_theta_max 0.964
_diffrn_measurement_device_type  'Stoe IPDS-II'
_diffrn_measurement_method       omega-scans
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0891
_diffrn_reflns_av_sigmaI/netI    0.0973
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            18494
_diffrn_reflns_theta_full        26.93
_diffrn_reflns_theta_max         26.93
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    2.227
_exptl_absorpt_correction_T_max  0.967
_exptl_absorpt_correction_T_min  0.734
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'MULABS/PLATON (Spek, 1998)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.576
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1320
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.601
_refine_diff_density_min         -0.640
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     349
_refine_ls_number_reflns         5814
_refine_ls_number_restraints     21
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0839
_refine_ls_R_factor_gt           0.0560
_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^)+(0.0119P)^2^+7.0269P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0695
_refine_ls_wR_factor_ref         0.1419
_reflns_number_gt                2793
_reflns_number_total             5814
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg201424m_si_003.cif
_cod_data_source_block           bmmi_cecl6
_cod_original_sg_symbol_Hall     -P2ybc
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4505894