Extremely effective separations of pyridine/picoline mixtures through supramolecular chemistry strategies employing (4R,5R)-bis(diphenylhydroxymethyl)-2-spiro-1′-cyclohexane-1,3-dioxolane as the host compound
Recchia, Daniella L.; Barton, Benita; Hosten, Eric C.; CrystEngComm 27 (2025) 1960–1976; doi:10.1039/D5CE00111K

data_7250030
_publ_section_title
;
 Extremely effective separations of pyridine/picoline mixtures through
 supramolecular chemistry strategies employing
 (4R,5R)-bis(diphenylhydroxymethyl)-2-spiro-1&#x2032;-cyclohexane-1,3-dioxolane
 as the host compound
;
_journal_issue                   13
_journal_name_full               CrystEngComm
_journal_page_first              1960
_journal_page_last               1976
_journal_paper_doi               10.1039/D5CE00111K
_journal_volume                  27
_journal_year                    2025
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C34 H34 O4, C6 H7 N'
_chemical_formula_sum            'C40 H41 N O4'
_chemical_formula_weight         599.74
_chemical_name_systematic
(4R,5R)-Bis(diphenyldioxymethyl)-2-spiro-1'-cyclohexane-1,3-dioxane
_chemical_temperature_decomposition 351.68
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2019/3
_audit_update_record
;
2024-03-18 deposited with the CCDC.	2025-02-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.6305(17)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.3884(4)
_cell_length_b                   34.6497(13)
_cell_length_c                   10.1379(4)
_cell_measurement_reflns_used    9681
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      26.34
_cell_measurement_theta_min      2.80
_cell_volume                     3294.4(2)
_computing_cell_refinement       'SAINT V8.40B (Bruker AXS LLC, 2019)'
_computing_data_collection       'Bruker Instrument Service V6.2.16'
_computing_data_reduction        'SAINT V8.40B (Bruker AXS LLC, 2019)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 2012)'
_computing_publication_material
'PLATON (Spek, 2009) and MERCURY (Macrae, 2008)'
_computing_structure_refinement
'SHELXL-2019/2 (Sheldrick, 2015b)  and ShelXle (H\"ubschle, 2011)'
_computing_structure_solution    'SHELXT-2018/2 (Sheldrick, 2015a)'
_diffrn_ambient_temperature      200(2)
_diffrn_detector                 'Bruker PHOTON II 7 detector'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'four-circle KAPPA diffractometer'
_diffrn_measurement_device_type  'Bruker D8 QUEST'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0290
_diffrn_reflns_av_unetI/netI     0.0276
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       43
_diffrn_reflns_limit_k_min       -43
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            84228
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.383
_diffrn_reflns_theta_min         2.011
_diffrn_source                   'sealed x-ray tube'
_diffrn_source_current           1.4
_diffrn_source_power             70
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9532
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'SADABS V2016/2 (Krause, 2015)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.209
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             1280
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: 2-methylpyridine'
_exptl_crystal_size_max          0.479
_exptl_crystal_size_mid          0.324
_exptl_crystal_size_min          0.103
_refine_diff_density_max         0.334
_refine_diff_density_min         -0.255
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details
;
 Flack x determined using 6131 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.08(11)
_refine_ls_extinction_coef       0.0035(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2019/2 (Sheldrick 2019)'
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     845
_refine_ls_number_reflns         13432
_refine_ls_number_restraints     265
_refine_ls_restrained_S_all      1.090
_refine_ls_R_factor_all          0.0431
_refine_ls_R_factor_gt           0.0423
_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^)+(0.0618P)^2^+0.8761P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1135
_refine_ls_wR_factor_ref         0.1142
_reflns_Friedel_coverage         0.960
_reflns_Friedel_fraction_full    0.992
_reflns_Friedel_fraction_max     0.991
_reflns_number_gt                13132
_reflns_number_total             13432
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ce00111k2.cif
_cod_data_source_block           aq121
_cod_depositor_comments
'Adding full bibliography for 7250028--7250031.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7250030
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_min   0.964
_shelx_estimated_absorpt_t_max   0.992
_shelx_res_checksum              85790