Molecular salts of quinine: a crystal engineering route to enhance the aqueous solubility
Divya, Indira S.; Amrutha, Surendran; SeethaLekshmi, Sunil; Varughese, Sunil; CrystEngComm 23 (2021) 6942–6951; doi:10.1039/D1CE00791B

data_7243420
_publ_section_title
;
 Molecular salts of quinine: a crystal engineering route to enhance the
 aqueous solubility
;
_journal_issue                   39
_journal_name_full               CrystEngComm
_journal_page_first              6942
_journal_page_last               6951
_journal_paper_doi               10.1039/D1CE00791B
_journal_volume                  23
_journal_year                    2021
_chemical_formula_moiety         'C20 H25 N2 O2, C5 H7 O4, O'
_chemical_formula_sum            'C25 H32 N2 O7'
_chemical_formula_weight         472.52
_space_group_crystal_system      monoclinic
_space_group_IT_number           5
_space_group_name_Hall           'I 2y'
_space_group_name_H-M_alt        'I 1 2 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_date             2020-10-12
_audit_creation_method
;
Olex2 1.3
(compiled 2020.07.16 svn.r6f6c53a7 for OlexSys, GUI svn.r6139)
;
_audit_update_record
;
2020-10-13 deposited with the CCDC.	2021-08-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 116.74(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   20.206(7)
_cell_length_b                   6.6378(19)
_cell_length_c                   20.461(5)
_cell_measurement_reflns_used    2164
_cell_measurement_temperature    298
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.0
_cell_volume                     2450.8(13)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.1 b29 (Rigaku, 2013)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.1 b29 (Rigaku, 2013)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.1 b29 (Rigaku, 2013)
;
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_diffrn_ambient_temperature      298
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Rigaku Saturn 724+ HG'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0483
_diffrn_reflns_av_unetI/netI     0.0670
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.991
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            11284
_diffrn_reflns_point_group_measured_fraction_full 0.978
_diffrn_reflns_point_group_measured_fraction_max 0.958
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.517
_diffrn_reflns_theta_min         3.010
_diffrn_source_current           40.0
_diffrn_source_power             2.0
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.891
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Jacobson, Unpublished Results'
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.281
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         1.347
_refine_diff_density_min         -0.552
_refine_diff_density_rms         0.059
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   -1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     304
_refine_ls_number_reflns         5419
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0927
_refine_ls_R_factor_gt           0.0708
_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^)+(0.1266P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1952
_refine_ls_wR_factor_ref         0.2094
_reflns_Friedel_coverage         0.780
_reflns_Friedel_fraction_full    0.957
_reflns_Friedel_fraction_max     0.919
_reflns_number_gt                3726
_reflns_number_total             5419
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ce00791b2.cif
_cod_data_source_block           datam
_cod_depositor_comments
'Adding full bibliography for 7243420--7243429.cif.'
_cod_database_code               7243420
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.987
_shelx_estimated_absorpt_t_min   0.980
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 2(2)
 -1(2)
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
3.a Riding coordinates:
 O12(H12), N1(H1), O33(H33)
3.b Ternary CH refined with riding coordinates:
 C3(H3), C6(H6), C10(H10), C11(H11)
3.c Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C7(H7A,H7B), C8(H8A,H8B), C9(H9A,H9B), C28(H28A,H28B), C29(H29A,
 H29B), C30(H30A,H30B)
3.d Aromatic/amide H refined with riding coordinates:
 C4(H4), C14(H14), C15(H15), C19(H19), C23(H23), C24(H24)
3.e X=CH2 refined with riding coordinates:
 C5(H5A,H5B)
3.f Idealised Me refined as rotating group:
 C22(H22A,H22B,H22C)
;
_shelx_res_checksum              26411
_shelx_hkl_checksum              46381
_olex2_submission_special_instructions 'No special instructions were received'