2-Mercaptoimidazolium halides: structural diversity, stability and spontaneous racemisation
Braun, Doris Elfriede; Lampl, Martin; Kahlenberg, Volker; Wurst, Klaus; Schottenberger, Herwig; Hummel, Michael; Griesser, Ulrich J.; CrystEngComm  (2020) –; doi:10.1039/D0CE00774A

data_7241090
_publ_section_title
;
 2-Mercaptoimidazolium halides: structural diversity, stability and
 spontaneous racemisation
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/D0CE00774A
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C6 H10 N3 O S, Br'
_chemical_formula_sum            'C6 H10 Br N3 O S'
_chemical_formula_weight         252.14
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2014-08-15T12:16:29-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2020-05-27 deposited with the CCDC.	2020-08-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.1584(6)
_cell_length_b                   6.9422(3)
_cell_length_c                   8.7807(4)
_cell_measurement_reflns_used    2397
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      28.127
_cell_measurement_theta_min      3.547
_cell_volume                     924.02(7)
_computing_cell_refinement
;
        CrysAlisPro, Agilent Technologies,
        Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
        (compiled Jan 14 2014,18:38:05)
;
_computing_data_collection
;
        CrysAlisPro, Agilent Technologies,
        Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
        (compiled Jan 14 2014,18:38:05)
;
_computing_data_reduction
;
        CrysAlisPro, Agilent Technologies,
        Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
        (compiled Jan 14 2014,18:38:05)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR2002 (Burla et al., 2003)'
_diffrn_ambient_temperature      203(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 10.3575
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Ruby, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_UB_11      -0.026899
_diffrn_orient_matrix_UB_12      0.0199978
_diffrn_orient_matrix_UB_13      0.064186
_diffrn_orient_matrix_UB_21      -0.0080298
_diffrn_orient_matrix_UB_22      -0.0999439
_diffrn_orient_matrix_UB_23      0.0094426
_diffrn_orient_matrix_UB_31      0.0374387
_diffrn_orient_matrix_UB_32      -0.0070701
_diffrn_orient_matrix_UB_33      0.0481274
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0302
_diffrn_reflns_av_unetI/netI     0.0319
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            5309
_diffrn_reflns_theta_full        25.34
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         3.23
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    4.631
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.7956
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        CrysAlisPro, Agilent Technologies,
        Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
        (compiled Jan 14 2014,18:38:05)
        Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.812
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'prismatic fragment'
_exptl_crystal_F_000             504
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: methanol'
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.437
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.066
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.003(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     116
_refine_ls_number_reflns         1674
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.0344
_refine_ls_R_factor_gt           0.0287
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0133P)^2^+1.6419P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0585
_refine_ls_wR_factor_ref         0.0606
_reflns_number_gt                1527
_reflns_number_total             1674
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d0ce00774a2.cif
_cod_data_source_block           ml139_2
_cod_database_code               7241090