β-Pyridylenolate zinc catalysts for the ring-opening homo- and copolymerization of ε-caprolactone and lactides
Bai, Jianliang; Xiao, Xia; Zhang, Yue; Chao, Jianbin; Chen, Xia; Dalton Trans.  (2017) –; doi:10.1039/C7DT01877K

data_7043465
_publ_section_title
;
 \b-Pyridylenolate zinc catalysts for the ring-opening homo- and
 copolymerization of \e-caprolactone and lactides
;
_journal_name_full               'Dalton Trans.'
_journal_paper_doi               10.1039/C7DT01877K
_journal_year                    2017
_chemical_formula_sum            'C32 H34 N2 O2 Zn2'
_chemical_formula_weight         609.35
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-06-23 deposited with the CCDC.
2017-06-27 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.38(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.6781(17)
_cell_length_b                   8.5619(17)
_cell_length_c                   18.781(4)
_cell_measurement_reflns_used    4390
_cell_measurement_temperature    273
_cell_measurement_theta_max      27.4726
_cell_measurement_theta_min      2.3476
_cell_volume                     1395.0(5)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0337
_diffrn_reflns_av_unetI/netI     0.0324
_diffrn_reflns_Laue_measured_fraction_full 0.997
_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       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9259
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.479
_diffrn_reflns_theta_min         2.169
_exptl_absorpt_coefficient_mu    1.751
_exptl_absorpt_correction_T_max  0.7680
_exptl_absorpt_correction_T_min  1.0000
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.451
_exptl_crystal_description       block
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.316
_exptl_crystal_size_mid          0.162
_exptl_crystal_size_min          0.096
_refine_diff_density_max         0.421
_refine_diff_density_min         -0.557
_refine_diff_density_rms         0.173
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         3181
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0436
_refine_ls_R_factor_gt           0.0374
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.4190P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1288
_refine_ls_wR_factor_ref         0.1382
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3001
_reflns_number_total             3181
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7dt01877k2.cif
_cod_data_source_block           1
_cod_database_code               7043465
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.721
_shelx_estimated_absorpt_t_max   0.721
_shelx_res_checksum              41396