Crystal engineering of the cystic fibrosis drug ivacaftor: salts, solvates and hydrate forms with solubility and stability studies
Doguparthi, Naga Prathyusha; Kanagavel, Manimurugan; Samreen, Sabiqa; Navya, Yaramala; Soujanya, Yarasi; Swain, Debasish; Nechipadappu, Sunil Kumar; CrystEngComm 28 (2026) 1621–1635; doi:10.1039/D5CE01068C

data_7251467
_publ_section_title
;
 Crystal engineering of the cystic fibrosis drug ivacaftor: salts,
 solvates and hydrate forms with solubility and stability studies
;
_journal_issue                   10
_journal_name_full               CrystEngComm
_journal_page_first              1621
_journal_page_last               1635
_journal_paper_doi               10.1039/D5CE01068C
_journal_volume                  28
_journal_year                    2026
_chemical_formula_moiety         'C24 H29 N2 O3, C4 H8 O2, Cl [+ solvent]'
_chemical_formula_sum            'C28 H37 Cl N2 O5'
_chemical_formula_weight         517.04
_chemical_name_systematic        'ivacaftor hydrochloride ethyl acetate solvate'
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     difmap
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2019/3
_audit_update_record
;
2025-10-10 deposited with the CCDC.	2026-01-28 downloaded from the CCDC.
;
_cell_angle_alpha                76.476(6)
_cell_angle_beta                 85.972(5)
_cell_angle_gamma                89.973(5)
_cell_formula_units_Z            2
_cell_length_a                   10.2784(14)
_cell_length_b                   10.5283(17)
_cell_length_c                   15.382(3)
_cell_measurement_reflns_used    5062
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      24.03
_cell_measurement_theta_min      2.33
_cell_volume                     1614.2(5)
_computing_cell_refinement       '<i>SAINT</i> (Bruker, 2019)'
_computing_data_collection       '<i>APEX5</i> (Bruker, 2023)'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2019)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2019)'
_diffrn_ambient_temperature      294(2)
_diffrn_detector_area_resol_mean 7.391
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'Bruker D8 VENTURE PHOTON III C14'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1172
_diffrn_reflns_av_unetI/netI     0.1142
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.972
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            44076
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.972
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.781
_diffrn_reflns_theta_min         1.987
_diffrn_source                   'Incoatec I\mS 3.0'
_exptl_absorpt_coefficient_mu    0.152
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6032
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 SADABS 2016/2: Krause, L., Herbst-Irmer, R., Sheldrick G.M. & Stalke D.,
 J. Appl. Cryst. 48 (2015) 3-10
;
_exptl_crystal_density_diffrn    1.064
_exptl_crystal_description       needle
_exptl_crystal_F_000             552
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: ethyl acetate'
_exptl_crystal_size_max          0.180
_exptl_crystal_size_mid          0.120
_exptl_crystal_size_min          0.090
_refine_diff_density_max         0.315
_refine_diff_density_min         -0.183
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     406
_refine_ls_number_reflns         8154
_refine_ls_number_restraints     96
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.1177
_refine_ls_R_factor_gt           0.0607
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0537P)^2^+0.1688P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1580
_refine_ls_wR_factor_ref         0.1943
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4174
_reflns_number_total             8154
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ce01068c2.cif
_cod_data_source_block           mo_va329_0m_a_sq
_cod_depositor_comments
'Adding full bibliography for 7251465--7251473.cif.'
_cod_original_cell_volume        1614.1(4)
_cod_database_code               7251467
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_min   0.973
_shelx_estimated_absorpt_t_max   0.986
_shelx_res_checksum              72566
_shelx_fab_checksum              96681