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_7043464
_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            'C34 H38 N2 O2 Zn2'
_chemical_formula_weight         637.40
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   mixed
_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                82.944(2)
_cell_angle_beta                 69.632(2)
_cell_angle_gamma                79.457(2)
_cell_formula_units_Z            1
_cell_length_a                   8.3149(5)
_cell_length_b                   9.3219(6)
_cell_length_c                   10.6244(7)
_cell_measurement_reflns_used    5628
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.2815
_cell_measurement_theta_min      2.9285
_cell_volume                     757.42(8)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0230
_diffrn_reflns_av_unetI/netI     0.0294
_diffrn_reflns_Laue_measured_fraction_full 0.975
_diffrn_reflns_Laue_measured_fraction_max 0.974
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            7573
_diffrn_reflns_point_group_measured_fraction_full 0.975
_diffrn_reflns_point_group_measured_fraction_max 0.974
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.282
_diffrn_reflns_theta_min         2.928
_exptl_absorpt_coefficient_mu    1.616
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.397
_exptl_crystal_description       block
_exptl_crystal_F_000             332
_exptl_crystal_size_max          0.240
_exptl_crystal_size_mid          0.120
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.469
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.057
_refine_ls_extinction_coef       0.0089(16)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     196
_refine_ls_number_reflns         3655
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0302
_refine_ls_R_factor_gt           0.0256
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0299P)^2^+0.3243P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0652
_refine_ls_wR_factor_ref         0.0676
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3333
_reflns_number_total             3655
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7dt01877k2.cif
_cod_data_source_block           sasa
_cod_database_code               7043464
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.738
_shelx_estimated_absorpt_t_max   0.909
_shelx_res_checksum              93339