Strategic synthon approach in obtaining cocrystals and cocrystal polymorphs of a high-Z′ system deferiprone – an anti-thalassemia drug
Rajendrakumar, Satyasree; Surampudi Venkata Sai Durga, Anuja; Balasubramanian, Sridhar; Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 77 (2021) 946–964; doi:10.1107/S205252062100980X

data_2022899
_publ_section_title
;
 Strategic synthon approach in obtaining cocrystals and cocrystal
 polymorphs of a high-Z&#x2032; system deferiprone -- an anti-thalassemia
 drug
;
_journal_coeditor_code           LO5093
_journal_issue                   6
_journal_name_full
'Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials'
_journal_page_first              946
_journal_page_last               964
_journal_paper_doi               10.1107/S205252062100980X
_journal_volume                  77
_journal_year                    2021
_chemical_formula_moiety         'C7 H9 N O2, 2(C6 H6 O3)'
_chemical_formula_sum            'C19 H21 N O8'
_chemical_formula_weight         391.37
_chemical_name_common            'Deferiprone-Pyrogallol (2:4)'
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   14.592(2)
_cell_length_b                   9.3121(11)
_cell_length_c                   26.795(4)
_cell_measurement_reflns_used    7479
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.50
_cell_measurement_theta_min      2.32
_cell_volume                     3641.0(9)
_computing_cell_refinement       '<i>SAINT</i> (Bruker, 2016)'
_computing_data_collection       '<i>APEX3</i> (Bruker, 2016)'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'DIAMOND (Brandenburg & Putz, 2005)'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    '<i>SHELXT</i> (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.967
_diffrn_measured_fraction_theta_max 0.963
_diffrn_measurement_device_type  'Bruker D8 QUEST PHOTON-100'
_diffrn_measurement_method       '\w and \f'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1197
_diffrn_reflns_av_unetI/netI     0.1854
_diffrn_reflns_Laue_measured_fraction_full 0.967
_diffrn_reflns_Laue_measured_fraction_max 0.963
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            16757
_diffrn_reflns_point_group_measured_fraction_full 0.772
_diffrn_reflns_point_group_measured_fraction_max 0.760
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.493
_diffrn_reflns_theta_min         2.315
_diffrn_source                   microfocus
_exptl_absorpt_coefficient_mu    0.112
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.5447
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker, 2016'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.428
_exptl_crystal_description       block
_exptl_crystal_F_000             1648
_exptl_crystal_size_max          0.320
_exptl_crystal_size_mid          0.280
_exptl_crystal_size_min          0.180
_refine_diff_density_max         0.447
_refine_diff_density_min         -0.401
_refine_diff_density_rms         0.090
_refine_ls_abs_structure_details
;
 Flack x determined using 732 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.4(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     565
_refine_ls_number_reflns         6362
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.1648
_refine_ls_R_factor_gt           0.0730
_refine_ls_shift/su_max          0.027
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0646P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1301
_refine_ls_wR_factor_ref         0.1557
_reflns_Friedel_coverage         0.546
_reflns_Friedel_fraction_full    0.568
_reflns_Friedel_fraction_max     0.549
_reflns_number_gt                3817
_reflns_number_total             6362
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            lo5093sup1.cif
_cod_data_source_block           KA1032_0m_def-pyro_2_4
_cod_original_cell_volume        3640.9(8)
_cod_database_code               2022899
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.965
_shelx_estimated_absorpt_t_max   0.980
_shelx_res_checksum              28182
_shelx_hkl_checksum              63829
_cod_database_fobs_code 2022899