Pressure-induced phase behaviour and compressibility of the racemic and chiral solid forms, ofloxacin and levofloxacin
Gasol-Cardona, Julia; Ward, Martin R.; Comboni, Davide; Hanfland, Micheal; Scatena, Rebecca; Warren, Mark R.; Maloney, Andrew G. P.; Oswald, Iain D. H.; CrystEngComm 27 (2025) 7662–7676; doi:10.1039/D5CE00855G

data_7251178
_publ_section_title
;
 Pressure-induced phase behaviour and compressibility of the racemic and
 chiral solid forms, ofloxacin and levofloxacin
;
_journal_issue                   47
_journal_name_full               CrystEngComm
_journal_page_first              7662
_journal_page_last               7676
_journal_paper_doi               10.1039/D5CE00855G
_journal_volume                  27
_journal_year                    2025
_chemical_formula_moiety         'C18 H20 F N3 O4, 0.25(H4 O2)'
_chemical_formula_sum            'C18 H21 F N3 O4.5'
_chemical_formula_weight         370.38
_chemical_name_systematic        'Levofloxacin hydrate'
_space_group_crystal_system      monoclinic
_space_group_IT_number           5
_space_group_name_Hall           'C 2y'
_space_group_name_H-M_alt        'C 1 2 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2019/3
_audit_update_record
;
2025-08-19 deposited with the CCDC.	2025-10-29 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 113.490(4)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   28.1035(17)
_cell_length_b                   6.5548(4)
_cell_length_c                   18.263(2)
_cell_measurement_pressure       1.26
_cell_measurement_reflns_used    14280
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.745
_cell_measurement_theta_min      2.347
_cell_volume                     3085.5(4)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.619
_diffrn_measured_fraction_theta_max 0.619
_diffrn_measurement_device_type  'Bruker D8 Photon III'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0651
_diffrn_reflns_av_unetI/netI     0.0713
_diffrn_reflns_Laue_measured_fraction_full 0.619
_diffrn_reflns_Laue_measured_fraction_max 0.619
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            14280
_diffrn_reflns_point_group_measured_fraction_full 0.605
_diffrn_reflns_point_group_measured_fraction_max 0.605
_diffrn_reflns_theta_full        24.745
_diffrn_reflns_theta_max         24.745
_diffrn_reflns_theta_min         2.347
_exptl_absorpt_coefficient_mu    0.124
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_density_diffrn    1.595
_exptl_crystal_description       plate
_exptl_crystal_F_000             1560
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: acetonitrile'
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.542
_refine_diff_density_min         -0.548
_refine_diff_density_rms         0.158
_refine_ls_abs_structure_details
;
 Flack x determined using 757 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.7(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     225
_refine_ls_number_reflns         3200
_refine_ls_number_restraints     123
_refine_ls_restrained_S_all      1.999
_refine_ls_R_factor_all          0.1250
_refine_ls_R_factor_gt           0.0794
_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^)+(0.1743P)^2^+3.1394P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2173
_refine_ls_wR_factor_ref         0.2642
_reflns_Friedel_coverage         0.783
_reflns_Friedel_fraction_full    0.588
_reflns_Friedel_fraction_max     0.588
_reflns_number_gt                2189
_reflns_number_total             3200
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ce00855g2.cif
_cod_data_source_block           LH_PE_1p26
_cod_depositor_comments
'Adding full bibliography for 7251165--7251187.cif.'
_cod_original_cell_volume        3085.5(5)
_cod_original_sg_symbol_H-M      'C 2'
_cod_original_formula_sum        'C18 H21 F N3 O4.50'
_cod_database_code               7251178
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_min   0.978
_shelx_estimated_absorpt_t_max   0.998
_shelx_res_checksum              24512