TADDOLs and methylcyclohexanones: selectivity, resolution and the kinetics of decomposition
Bawa, Hana; Su, Hong; De Doncker, Stephen; Bourne, Susan A.; Nassimbeni, Luigi R.; CrystEngComm 28 (2026) 1690–1698; doi:10.1039/D5CE01022E

data_7251564
_publ_section_title
;
 TADDOLs and methylcyclohexanones: selectivity, resolution and the
 kinetics of decomposition
;
_journal_issue                   10
_journal_name_full               CrystEngComm
_journal_page_first              1690
_journal_page_last               1698
_journal_paper_doi               10.1039/D5CE01022E
_journal_volume                  28
_journal_year                    2026
_chemical_formula_sum            'C40 H44 O5'
_chemical_formula_weight         604.75
_space_group_crystal_system      orthorhombic
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_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2025-08-12 deposited with the CCDC.	2026-02-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.1811(19)
_cell_length_b                   15.953(4)
_cell_length_c                   22.039(6)
_cell_measurement_reflns_used    9819
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.155
_cell_measurement_theta_min      2.403
_cell_volume                     3228.0(14)
_computing_cell_refinement
'SAINT (7.60a, Bruker AXS Inc., Madison, WI, USA, 2006)'
_computing_data_collection
'SAINT (7.60a, Bruker AXS Inc., Madison, WI, USA, 2006)'
_computing_data_reduction
'SAINT (7.60a, Bruker AXS Inc., Madison, WI, USA, 2006)'
_computing_molecular_graphics    'X-Seed (Barbour, 2001'
_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker D8 Venture Diffractometer'
_diffrn_measurement_method       '1\% \f scans and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0812
_diffrn_reflns_av_unetI/netI     0.0408
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            78828
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.384
_diffrn_reflns_theta_min         2.403
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.939
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2001)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.244
_exptl_crystal_description       block
_exptl_crystal_F_000             1296
_exptl_crystal_size_max          0.390
_exptl_crystal_size_mid          0.130
_exptl_crystal_size_min          0.120
_exptl_transmission_factor_max   1.000
_exptl_transmission_factor_min   0.939
_refine_diff_density_max         0.333
_refine_diff_density_min         -0.203
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details
;
 Flack x determined using 2970 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.0(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         8063
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0468
_refine_ls_R_factor_gt           0.0380
_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^)+(0.0339P)^2^+0.9504P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0840
_refine_ls_wR_factor_ref         0.0895
_reflns_Friedel_coverage         0.790
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.994
_reflns_number_gt                7220
_reflns_number_total             8063
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ce01022e2.cif
_cod_data_source_block           VI
_cod_depositor_comments
'Adding full bibliography for 7251558--7251565.cif.'
_cod_original_cell_volume        3228.0(13)
_cod_database_code               7251564
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.969
_shelx_estimated_absorpt_t_max   0.990
_shelx_res_checksum              42647