Understanding the stability of the amorphous form of darifenacin
Nowak, Przemysław; Pietrzak, Anna; Dudek, Marta K.; CrystEngComm 27 (2025) 1927–1938; doi:10.1039/D4CE01257G

data_7249968
_publ_section_title
;
 Understanding the stability of the amorphous form of darifenacin
;
_journal_issue                   13
_journal_name_full               CrystEngComm
_journal_page_first              1927
_journal_page_last               1938
_journal_paper_doi               10.1039/D4CE01257G
_journal_volume                  27
_journal_year                    2025
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C28 H30 N2 O2, 0.637(H2 O)'
_chemical_formula_sum            'C28 H31.27 N2 O2.64'
_chemical_formula_weight         437.99
_chemical_name_common            'Darifenacin hydrate'
_space_group_crystal_system      triclinic
_space_group_IT_number           1
_space_group_name_Hall           'P 1'
_space_group_name_H-M_alt        'P 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     other
_audit_creation_method           SHELXL-2019/3
_audit_update_record
;
2024-12-02 deposited with the CCDC.	2025-02-18 downloaded from the CCDC.
;
_cell_angle_alpha                88.3040(10)
_cell_angle_beta                 88.304(2)
_cell_angle_gamma                69.875(3)
_cell_formula_units_Z            1
_cell_length_a                   6.8046(2)
_cell_length_b                   8.8154(3)
_cell_length_c                   10.4843(4)
_cell_measurement_reflns_used    14458
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      74.8010
_cell_measurement_theta_min      4.2140
_cell_volume                     590.12(4)
_computing_cell_refinement       'CrysAlisPro 1.171.42.80a (Rigaku OD, 2023)'
_computing_data_collection       'CrysAlisPro 1.171.42.80a (Rigaku OD, 2023)'
_computing_data_reduction        'CrysAlisPro 1.171.42.80a (Rigaku OD, 2023)'
_computing_structure_refinement  'SHELXL-2019/3 (Sheldrick, 2019)'
_computing_structure_solution    'SHELXT 2019/3 (Sheldrick, 2019)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.940
_diffrn_measurement_device_type  'XtaLAB Synergy, Dualflex, HyPix'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0467
_diffrn_reflns_av_unetI/netI     0.0321
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.940
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            21405
_diffrn_reflns_point_group_measured_fraction_full 0.975
_diffrn_reflns_point_group_measured_fraction_max 0.884
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         76.614
_diffrn_reflns_theta_min         4.220
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.624
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.616
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.42.80a (Rigaku Oxford Diffraction, 2023)
Numerical absorption correction based on gaussian integration over
a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.233
_exptl_crystal_description       block
_exptl_crystal_F_000             234.4
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: methanol'
_exptl_crystal_size_max          0.220
_exptl_crystal_size_mid          0.180
_exptl_crystal_size_min          0.120
_refine_diff_density_max         0.179
_refine_diff_density_min         -0.178
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details
;
 Flack x determined using 1883 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.09(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     311
_refine_ls_number_reflns         4406
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0372
_refine_ls_R_factor_gt           0.0357
_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^)+(0.0540P)^2^+0.0658P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0910
_refine_ls_wR_factor_ref         0.0922
_reflns_Friedel_coverage         0.880
_reflns_Friedel_fraction_full    0.951
_reflns_Friedel_fraction_max     0.828
_reflns_number_gt                4237
_reflns_number_total             4406
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4ce01257g2.cif
_cod_data_source_block           daryfenacyna-hydrat-maunal
_cod_depositor_comments
'Adding full bibliography for 7249968--7249969.cif.'
_cod_database_code               7249968
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_min   0.875
_shelx_estimated_absorpt_t_max   0.929
_oxdiff_exptl_absorpt_empirical_full_min 0.692
_oxdiff_exptl_absorpt_empirical_full_max 1.794
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
- Detector area scaling
;
_shelx_res_checksum              98907