Ionic co-crystals of enantiopure and racemic histidine with calcium halides
Shemchuk, Oleksii; Degli Esposti, Lorenzo; Grepioni, Fabrizia; Braga, Dario; CrystEngComm  (2017) –; doi:10.1039/C7CE01326D

data_7229222
_publ_section_title
;
 Ionic co-crystals of enantiopure and racemic histidine with calcium
 halides
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/C7CE01326D
_journal_year                    2017
_chemical_absolute_configuration rm
_chemical_formula_sum            'C12 H24 Ca Cl2 N6 O7'
_chemical_formula_weight         475.35
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2017-09-18 deposited with the CCDC.
2017-09-21 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 114.287(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   20.6509(11)
_cell_length_b                   5.1087(3)
_cell_length_c                   10.7880(5)
_cell_measurement_reflns_used    986
_cell_measurement_temperature    295
_cell_measurement_theta_max      27.2100
_cell_measurement_theta_min      3.7970
_cell_volume                     1037.40(10)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35g (release 09-12-2014 CrysAlis171 .NET)
(compiled Dec  9 2014,15:38:47)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35g (release 09-12-2014 CrysAlis171 .NET)
(compiled Dec  9 2014,15:38:47)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35g (release 09-12-2014 CrysAlis171 .NET)
(compiled Dec  9 2014,15:38:47)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      295
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 16.1340
_diffrn_detector_type            Sapphire3
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.820
_diffrn_measurement_details
;
  1 omega  -54.00   50.00   1.0000   75.0000
omega____ theta____ kappa____ phi______ frames
    -      -16.5159   19.0000   60.0000 104

  2 omega  -34.00   39.00   1.0000   75.0000
omega____ theta____ kappa____ phi______ frames
    -       17.6096  -38.0000 -120.0000 73

  3 omega   49.00   74.00   1.0000   75.0000
omega____ theta____ kappa____ phi______ frames
    -       17.6096  178.0000  -90.0000 25

;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Sapphire3'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0209
_diffrn_reflns_av_sigmaI/netI    0.0503
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            2328
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         29.59
_diffrn_reflns_theta_min         3.56
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.606
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.91031
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35g (release 09-12-2014 CrysAlis171 .NET)
(compiled Dec  9 2014,15:38:47)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.522
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             496
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.288
_refine_diff_density_min         -0.321
_refine_diff_density_rms         0.102
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.04(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.745
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         1720
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.744
_refine_ls_R_factor_all          0.0527
_refine_ls_R_factor_gt           0.0390
_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^)+(0.0910P)^2^+5.0599P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0986
_refine_ls_wR_factor_ref         0.1306
_reflns_number_gt                1464
_reflns_number_total             1720
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c7ce01326d2.cif
_cod_data_source_block           L-Histidine-CalciumChloride-hydrate
_cod_original_sg_symbol_H-M      C2
_cod_database_code               7229222