Efficient and controlled ring-opening copolymerization of cyclohexene oxide with cyclic anhydrides catalyzed by proline-based chiral alkyl Al(III) compounds.
Ray, Ranay Kumar; Sudhadevi Antharjanam, P. K.; Chakraborty, Debashis; Faraday discussions 262 (2026) 191–211; doi:10.1039/d5fd00048c

data_1574922
_publ_section_title
;
 Efficient and controlled ring-opening copolymerization of cyclohexene
 oxide with cyclic anhydrides catalyzed by proline-based chiral alkyl
 Al(III) compounds.
;
_journal_issue                   0
_journal_name_full               'Faraday discussions'
_journal_page_first              191
_journal_page_last               211
_journal_paper_doi               10.1039/d5fd00048c
_journal_volume                  262
_journal_year                    2026
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C22 H27 N O3'
_chemical_formula_sum            'C22 H27 N O3'
_chemical_formula_weight         353.44
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
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_audit_update_record
;
2025-04-23 deposited with the CCDC.	2025-06-19 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
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_cell_length_b                   9.6525(7)
_cell_length_c                   22.6244(15)
_cell_measurement_reflns_used    9258
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.50
_cell_measurement_theta_min      2.91
_cell_volume                     1945.4(2)
_computing_cell_refinement       'APEX4 V8.40B (Bruker, 2021)'
_computing_data_collection       'APEX4 (Bruker, v2021.4-0)'
_computing_data_reduction        'SAINT/XPREP (Bruker, 2021)'
_computing_molecular_graphics    'ORTEP3 (Farrugia, 2012) '
_computing_publication_material  'SHELXL-2019/3 (Sheldrick, 2019)'
_computing_structure_refinement  'SHELXL-2019/3 (Sheldrick, 2019)'
_computing_structure_solution    'SHELXT-2018/2 (Sheldrick, 2018)'
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_diffrn_measured_fraction_theta_max 0.998
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'Bruker D8 VENTURE diffractometer equipped with PHOTON II detector'
_diffrn_measurement_method       '\w and \f scan'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0317
_diffrn_reflns_av_unetI/netI     0.0203
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            50541
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.518
_diffrn_reflns_theta_min         3.240
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6874
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 - Bruker AXS area detector scaling and absorption correction'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.207
_exptl_crystal_description       block
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.355
_exptl_crystal_size_mid          0.198
_exptl_crystal_size_min          0.134
_refine_diff_density_max         0.362
_refine_diff_density_min         -0.199
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details
;
 Flack x determined using 2425 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.13(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         5941
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0364
_refine_ls_R_factor_gt           0.0343
_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^)+(0.0541P)^2^+0.2934P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0875
_refine_ls_wR_factor_ref         0.0887
_reflns_Friedel_coverage         0.770
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                5724
_reflns_number_total             5941
_reflns_threshold_expression     'I > 2\s(I)'
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_cod_data_source_block           shelx
_cod_depositor_comments
'Adding full bibliography for 1574922--1574925.cif.'
_cod_database_code               1574922
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_min   0.972
_shelx_estimated_absorpt_t_max   0.989
_shelx_res_checksum              53059