Ring opening polymerization of d,l-lactide and ε-caprolactone catalysed by (pyrazol-1-yl)copper(ii) carboxylate complexes
Appavoo, Divambal; Spencer, Lara C.; Guzei, Ilia A.; Gómez-García, Carlos J.; van Wyk, Juanita L.; Darkwa, James; RSC Advances 11 (2021) 13475–13485; doi:10.1039/D1RA00339A

data_7242647
_publ_section_title
;
 Ring opening polymerization of d,l-lactide and \e-caprolactone catalysed
 by (pyrazol-1-yl)copper(ii) carboxylate complexes
;
_journal_issue                   22
_journal_name_full               'RSC Advances'
_journal_page_first              13475
_journal_page_last               13485
_journal_paper_doi               10.1039/D1RA00339A
_journal_volume                  11
_journal_year                    2021
_chemical_formula_moiety         'C64 H64 Cu2 N8 O8'
_chemical_formula_sum            'C64 H64 Cu2 N8 O8'
_chemical_formula_weight         1200.31
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2020-12-07
_audit_creation_method
;
Olex2 1.3
(compiled 2020.11.12 svn.r5f609507 for OlexSys, GUI svn.r6226)
;
_audit_update_record
;
2020-12-17 deposited with the CCDC.	2021-03-24 downloaded from the CCDC.
;
_cell_angle_alpha                79.52(5)
_cell_angle_beta                 73.95(4)
_cell_angle_gamma                88.13(4)
_cell_formula_units_Z            1
_cell_length_a                   10.468(5)
_cell_length_b                   10.853(6)
_cell_length_c                   13.430(4)
_cell_measurement_reflns_used    999
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.53
_cell_measurement_theta_min      2.71
_cell_volume                     1441.6(12)
_computing_cell_refinement       'SAINT Ver. 7.24A (Bruker-AXS, 2007)'
_computing_data_collection       'APEX2 Ver. 2.1-4 (Bruker-AXS, 2009)'
_computing_data_reduction        'SAINT Ver. 7.24A'
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS  (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.15
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker SMART APEX2 area detector'
_diffrn_measurement_method       '0.60\% \w and 0.6\% \f scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0209
_diffrn_reflns_av_unetI/netI     0.0249
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            24410
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         30.533
_diffrn_reflns_theta_min         2.706
_exptl_absorpt_coefficient_mu    0.801
_exptl_absorpt_correction_T_max  0.9387
_exptl_absorpt_correction_T_min  0.8692
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
SADABS  (Bruker-AXS, 2007)
;
_exptl_crystal_colour            green
_exptl_crystal_colour_primary    green
_exptl_crystal_density_diffrn    1.383
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             626
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.542
_refine_diff_density_min         -0.337
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     374
_refine_ls_number_reflns         8782
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0369
_refine_ls_R_factor_gt           0.0311
_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^)+(0.0378P)^2^+0.8064P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0807
_refine_ls_wR_factor_ref         0.0838
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7813
_reflns_number_total             8782
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ra00339a2.cif
_cod_data_source_block           darkwa137
_cod_database_code               7242647
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.939
_shelx_estimated_absorpt_t_min   0.869
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C20(H20A,H20B), C27(H27A,H27B)
2.b Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C10(H10), C11(H11), C12(H12),
 C13(H13), C14(H14), C17(H17), C22(H22), C23(H23), C24(H24), C25(H25), C30(H30)
2.c Idealised Me refined as rotating group:
 C15(H15A,H15B,H15C), C19(H19A,H19B,H19C), C28(H28A,H28B,H28C), C32(H32A,H32B,
 H32C)
;
_shelx_res_checksum              88657
_olex2_submission_special_instructions 'No special instructions were received'