Homochiral imidazolium-based dicarboxylate compounds: Structure and solution behaviour
Caballero, Pedro; Colodrero, Rosario M.P.; Conejo, María del Mar; Pastor, Antonio; Álvarez, Eleuterio; Montilla, Francisco; Carrasco, Carlos J.; Nicasio, Antonio I.; Galindo, Agustín; Inorganica Chimica Acta 513 (2020) 119923–; doi:10.1016/j.ica.2020.119923

data_1564045
_publ_section_title
;
 Homochiral imidazolium-based dicarboxylate compounds: Structure and
 solution behaviour
;
_journal_name_full               'Inorganica Chimica Acta'
_journal_page_first              119923
_journal_paper_doi               10.1016/j.ica.2020.119923
_journal_volume                  513
_journal_year                    2020
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C13 H19 N2 O4, H4 N'
_chemical_formula_sum            'C13 H23 N3 O4'
_chemical_formula_weight         285.34
_space_group_crystal_system      tetragonal
_space_group_IT_number           76
_space_group_name_Hall           'P 4w'
_space_group_name_H-M_alt        'P 41'
_atom_sites_solution_hydrogens   mixed
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.1542(2)
_cell_length_b                   11.1542(2)
_cell_length_c                   12.5224(3)
_cell_measurement_reflns_used    9920
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      34.33
_cell_measurement_theta_min      2.45
_cell_volume                     1557.99(5)
_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-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      193(2)
_diffrn_detector_area_resol_mean 8.26
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type
; 
 Bruker-Nonius X8kappa APEX II CCD area detector 
;
_diffrn_measurement_method       'phi and omega scans with narrow frames'
_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  0.0274
_diffrn_reflns_av_unetI/netI     0.0128
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_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       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            21191
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.249
_diffrn_reflns_theta_min         2.445
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.7470
_exptl_absorpt_correction_T_min  0.5810
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
program SADABS, Bruker (2001). 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.216
_exptl_crystal_description       block
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.500
_exptl_crystal_size_mid          0.400
_exptl_crystal_size_min          0.300
_refine_diff_density_max         0.113
_refine_diff_density_min         -0.227
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
; 
 Flack x determined using 1308 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         2810
_refine_ls_number_restraints     20
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0253
_refine_ls_R_factor_gt           0.0251
_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^)+(0.0401P)^2^+0.1705P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0642
_refine_ls_wR_factor_ref         0.0644
_reflns_Friedel_coverage         0.906
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                2780
_reflns_number_total             2810
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file
'global_CIF_with_all_4_structures_in_one_Shelxl_2018_3.cif'
_cod_data_source_block           2s
_cod_original_cell_volume        1557.99(7)
_cod_database_code               1564045
_shelx_estimated_absorpt_t_min   0.956
_shelx_estimated_absorpt_t_max   0.973
_shelx_res_checksum              93697
_shelx_hkl_checksum              54213