Ring-Opening Polymerization of Lactides Initiated by Zinc Alkoxides Derived from NNO-Tridentate Ligands
Chen, Hsuan-Ying; Tang, Hui-Yi; Lin, Chu-Chieh; Macromolecules 39 (2006) 3745–3752; doi:10.1021/ma060471r

data_1505778
_publ_section_title
;
 Ring-Opening Polymerization of Lactides Initiated by Zinc Alkoxides
 Derived from NNO-Tridentate Ligands
;
_journal_coden_ASTM              MAMOBX
_journal_issue                   11
_journal_name_full               Macromolecules
_journal_page_first              3745
_journal_page_last               3752
_journal_paper_doi               10.1021/ma060471r
_journal_volume                  39
_journal_year                    2006
_chemical_formula_sum            'C19 H23 Cl3 N2 O2 Zn'
_chemical_formula_weight         483.11
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.8690(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.9948(7)
_cell_length_b                   15.5672(9)
_cell_length_c                   11.7767(7)
_cell_measurement_reflns_used    6605
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.983
_cell_measurement_theta_min      2.271
_cell_volume                     2178.3(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0197
_diffrn_reflns_av_sigmaI/netI    0.0178
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            12155
_diffrn_reflns_theta_full        26.05
_diffrn_reflns_theta_max         26.05
_diffrn_reflns_theta_min         1.71
_exptl_absorpt_coefficient_mu    1.511
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7508
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.473
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelpiped
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.39
_refine_diff_density_max         0.520
_refine_diff_density_min         -0.544
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         4300
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0423
_refine_ls_R_factor_gt           0.0328
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1186
_refine_ls_wR_factor_ref         0.1292
_reflns_number_gt                3441
_reflns_number_total             4300
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ma060471rsi20060302_085819.cif
_cod_data_source_block           2a
_cod_depositor_comments
;
 Updated bibliographic information.

 Antanas Vaitkus,
 2019-10-09
;
_cod_database_code               1505778