Double Salt Ionic Liquids Based on 1-Ethyl-3-Methylimidazolium Acetate and Hydroxyl-Functionalized Ammonium Acetates: Strong Effects of Weak Interactions
Pereira, Jorge F. B.; Barber, Patrick S.; Kelley, Steven Paul; Berton, Paula; Rogers, Robin D.; Phys. Chem. Chem. Phys.  (2017) –; doi:10.1039/C7CP05710E

data_7229209
_publ_section_title
;
 Double Salt Ionic Liquids Based on 1-Ethyl-3-Methylimidazolium Acetate
 and Hydroxyl-Functionalized Ammonium Acetates: Strong Effects of Weak
 Interactions
;
_journal_name_full               'Phys. Chem. Chem. Phys.'
_journal_paper_doi               10.1039/C7CP05710E
_journal_year                    2017
_chemical_formula_sum            'C6 H15 N O2'
_chemical_formula_weight         133.19
_chemical_properties_physical    Deliquescent
_space_group_crystal_system      tetragonal
_space_group_IT_number           114
_space_group_name_Hall           'P -4 2n'
_space_group_name_H-M_alt        'P -4 21 c'
_symmetry_space_group_name_Hall  'P -4 2n'
_symmetry_space_group_name_H-M   'P -4 21 c'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-08-21 deposited with the CCDC.
2017-09-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   10.9186(7)
_cell_length_b                   10.9186(7)
_cell_length_c                   13.3235(11)
_cell_measurement_reflns_used    3529
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      74.24
_cell_measurement_theta_min      5.24
_cell_volume                     1588.37(19)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.1290
_diffrn_reflns_av_unetI/netI     0.0941
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            8487
_diffrn_reflns_point_group_measured_fraction_full 0.987
_diffrn_reflns_point_group_measured_fraction_max 0.984
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         74.369
_diffrn_reflns_theta_min         5.237
_exptl_absorpt_coefficient_mu    0.670
_exptl_absorpt_correction_T_max  0.7538
_exptl_absorpt_correction_T_min  0.4559
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker AXScale'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.114
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             592
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.371
_refine_diff_density_min         -0.388
_refine_diff_density_rms         0.109
_refine_ls_abs_structure_details
; 
 Flack x determined using 480 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.2(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     88
_refine_ls_number_reflns         1605
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0815
_refine_ls_R_factor_gt           0.0694
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1087P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1591
_refine_ls_wR_factor_ref         0.1709
_reflns_Friedel_coverage         0.718
_reflns_Friedel_fraction_full    0.977
_reflns_Friedel_fraction_max     0.971
_reflns_number_gt                1352
_reflns_number_total             1605
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7cp05710e2.cif
_cod_data_source_block           NMe4OAc
_cod_original_cell_volume        1588.4(2)
_cod_database_code               7229209
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              69914