Steric and Chelating Ring Concerns on the L-Lactide Polymerization by Asymmetric β-Diketiminato Zinc Complexes
Chuang, Wan-Jung; Chen, Hsing-Yin; Chen, Wei-Ting; Chang, Heng Yi; Chiang, Michael, Y.; Hsu, Sodio C.N.; Chen, Hsuan-Ying; RSC Adv.  (2016) –; doi:10.1039/C6RA07453G

data_7224857
_publ_section_title
;
 Steric and Chelating Ring Concerns on the L-Lactide Polymerization by
 Asymmetric \b-Diketiminato Zinc Complexes
;
_journal_name_full               'RSC Adv.'
_journal_paper_doi               10.1039/C6RA07453G
_journal_year                    2016
_chemical_formula_moiety         'C26 H37 N3 Zn'
_chemical_formula_sum            'C26 H37 N3 Zn'
_chemical_formula_weight         456.96
_chemical_name_common            4
_chemical_name_systematic        '[L4ZnEt]'
_chemical_properties_physical
'Air-sensitive, Moisture-sensitive, Hygroscopic, Oxygen-sensitive'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-11-03 deposited with the CCDC.
2016-04-05 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 118.1850(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.8377(8)
_cell_length_b                   34.635(3)
_cell_length_c                   9.0028(9)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     2428.9(4)
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'NONIUS KappaCCD'
_diffrn_measurement_method       '\w scans'
_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  0.0398
_diffrn_reflns_av_sigmaI/netI    0.0454
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       34
_diffrn_reflns_limit_k_min       -40
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            15366
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         2.35
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.028
_exptl_absorpt_correction_T_max  0.9504
_exptl_absorpt_correction_T_min  0.8208
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.250
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             976
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: hexane'
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.429
_refine_diff_density_min         -0.365
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4249
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0625
_refine_ls_R_factor_gt           0.0437
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0495P)^2^+1.4854P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0979
_refine_ls_wR_factor_ref         0.1053
_reflns_number_gt                3308
_reflns_number_total             4249
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6ra07453g2.cif
_cod_data_source_block           4
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7224857