Hydrogen Bonding in the Crystal Structures of the Ionic Liquid Compounds Butyldimethylimidazolium Hydrogen Sulfate, Chloride, and Chloroferrate(II,III)
Philipp Kölle; Richard Dronskowski; Inorganic Chemistry 43 (2004) 2803–2809; doi:10.1021/ic035237l

data_4310919
_publ_section_title
;
 Hydrogen Bonding in the Crystal Structures of the Ionic Liquid Compounds
 Butyldimethylimidazolium Hydrogen Sulfate, Chloride, and
 Chloroferrate(II,III)
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              2803
_journal_page_last               2809
_journal_paper_doi               10.1021/ic035237l
_journal_volume                  43
_journal_year                    2004
_chemical_formula_sum            'C18 H34 Cl6 Fe1.5 N4'
_chemical_formula_weight         602.97
_chemical_melting_point          311(1)
_chemical_name_systematic
; 
1-butyl-2,3-dimethylimidazolium chloroferrrate(II,III) 
;
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.69(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   40.600(8)
_cell_length_b                   7.8800(16)
_cell_length_c                   18.490(4)
_cell_measurement_temperature    293(2)
_cell_volume                     5771(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_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  0.0410
_diffrn_reflns_av_sigmaI/netI    0.0519
_diffrn_reflns_limit_h_max       41
_diffrn_reflns_limit_h_min       -54
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            19822
_diffrn_reflns_theta_full        28.37
_diffrn_reflns_theta_max         28.37
_diffrn_reflns_theta_min         1.03
_exptl_absorpt_coefficient_mu    1.332
_exptl_crystal_density_diffrn    1.388
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2488
_refine_diff_density_max         0.677
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.008
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     382
_refine_ls_number_reflns         7177
_refine_ls_number_restraints     49
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.1102
_refine_ls_R_factor_gt           0.0560
_refine_ls_shift/su_max          0.115
_refine_ls_shift/su_mean         0.005
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0992P)^2^+5.2015P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1504
_refine_ls_wR_factor_ref         0.1897
_reflns_number_gt                4129
_reflns_number_total             7177
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic035237lsi20031027_082355.cif
_cod_data_source_block           bdmimfecln_213
_cod_original_formula_sum        'C18 H34 Cl6 Fe1.50 N4'
_cod_database_code               4310919