Diversity in a simple co-crystal: racemic and kryptoracemic behaviour
U. B. Rao Khandavilli; Matteo Lusi; Balakrishna R. Bhogala; Anita R. Maguire; Matthias Stein; Simon E. Lawrence; Chem.Commun. 52 (2016) 8309–8312; doi:10.1039/C6CC04148E

data_7119652
_publ_section_title
;
 Diversity in a simple co-crystal: racemic and kryptoracemic behaviour
;
_journal_name_full               Chem.Commun.
_journal_page_first              8309
_journal_page_last               8312
_journal_paper_doi               10.1039/C6CC04148E
_journal_volume                  52
_journal_year                    2016
_chemical_formula_moiety         'C11 H15 N O, C7 H6 O3'
_chemical_formula_sum            'C18 H21 N O4'
_chemical_formula_weight         315.36
_chemical_name_common
'3-Methyl-2-Phenylbutyramide-Salicylic acid-Polymorph III'
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_update_record
;
2016-05-16 deposited with the CCDC.
2016-06-08 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.060(4)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   10.0661(14)
_cell_length_b                   21.081(3)
_cell_length_c                   16.584(2)
_cell_measurement_reflns_used    4485
_cell_measurement_temperature    296.(2)
_cell_measurement_theta_max      21.6600
_cell_measurement_theta_min      2.2706
_cell_volume                     3465.1(8)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296.(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART X2S'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0774
_diffrn_reflns_av_unetI/netI     0.0458
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            46406
_diffrn_reflns_theta_full        25.12
_diffrn_reflns_theta_max         25.12
_diffrn_reflns_theta_min         1.58
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.77
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2014/5 (Bruker AXS Inc.)'
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_density_diffrn    1.209
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1344
_exptl_crystal_size_max          0.560
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.218
_refine_diff_density_min         -0.280
_refine_ls_extinction_coef       0.0010(3)
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     452
_refine_ls_number_reflns         6123
_refine_ls_number_restraints     8
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.1054
_refine_ls_R_factor_gt           0.0527
_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^)+(0.0610P)^2^+0.9202P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1240
_refine_ls_wR_factor_ref         0.1506
_reflns_number_gt                3564
_reflns_number_total             6123
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6cc04148e2.cif
_cod_data_source_block           Form_III
_cod_original_cell_volume        3465.1(9)
_cod_database_code               7119652
_shelx_res_checksum              94549
_shelx_hkl_checksum              75382