Highly Isoselective and Active Zinc Catalysts for rac-Lactide Polymerization: Effect of Pendant Groups of Aminophenolate Ligands
Kan, Chao; Hu, Jianwen; Huang, Yang; Wang, Haobing; Ma, Haiyan; Macromolecules 50 (2017) 7911–; doi:10.1021/acs.macromol.7b01420

data_1547593
_publ_section_title
;
 Highly Isoselective and Active Zinc Catalysts for rac-Lactide
 Polymerization: Effect of Pendant Groups of Aminophenolate Ligands
;
_journal_issue                   20
_journal_name_full               Macromolecules
_journal_page_first              7911
_journal_paper_doi               10.1021/acs.macromol.7b01420
_journal_volume                  50
_journal_year                    2017
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C48 H59 N3 O2 Si2 Zn'
_chemical_formula_sum            'C48 H59 N3 O2 Si2 Zn'
_chemical_formula_weight         831.53
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2015-05-25
_audit_creation_method
;
Olex2 1.2
(compiled 2015.01.26 svn.r3150 for OlexSys, GUI svn.r4998)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.2307(10)
_cell_length_b                   16.3927(15)
_cell_length_c                   23.767(2)
_cell_measurement_reflns_used    8710
_cell_measurement_temperature    130
_cell_measurement_theta_max      25.218
_cell_measurement_theta_min      2.20
_cell_volume                     4375.5(7)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      130
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0686
_diffrn_reflns_av_unetI/netI     0.0770
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            44188
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.605
_diffrn_reflns_theta_min         1.509
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.658
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.5299
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.0961 before and 0.0828 after correction.
The Ratio of minimum to maximum transmission is 0.7102.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_description       block
_exptl_crystal_F_000             1768
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.739
_refine_diff_density_min         -0.916
_refine_diff_density_rms         0.075
_refine_ls_abs_structure_details
;
 Flack x determined using 4300 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.012(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     513
_refine_ls_number_reflns         13418
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.0632
_refine_ls_R_factor_gt           0.0461
_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^)+(0.0545P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1051
_refine_ls_wR_factor_ref         0.1138
_reflns_Friedel_coverage         0.820
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.994
_reflns_number_gt                10979
_reflns_number_total             13418
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ma7b01420_si_001.cif
_cod_data_source_block           mo_dm15425_0m
_cod_depositor_comments
'Adding full bibliography for 1547592--1547598.cif.'
_cod_original_cell_volume        4375.6(7)
_cod_database_code               1547593
_shelxl_version_number           2014-3
_shelx_estimated_absorpt_t_max   0.908
_shelx_estimated_absorpt_t_min   0.827
_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 Ternary CH refined with riding coordinates:
 C10(H10), C11(H11)
2.b Secondary CH2 refined with riding coordinates:
 C7(H7A,H7B), C8(H8A,H8B), C12(H12A,H12B), C19(H19A,H19B), C20(H20A,H20B),
 C21(H21A,H21B)
2.c Aromatic/amide H refined with riding coordinates:
 C3(H3), C5(H5), C14(H14), C15(H15), C16(H16), C17(H17), C26(H26), C27(H27),
 C28(H28), C29(H29), C30(H30), C32(H32), C33(H33), C34(H34), C35(H35), C36(H36),
  C38(H38), C39(H39), C40(H40), C41(H41), C42(H42)
2.d Idealised Me refined as rotating group:
 C22(H22A,H22B,H22C), C23(H23A,H23B,H23C), C43(H43A,H43B,H43C), C44(H44A,H44B,
 H44C), C45(H45A,H45B,H45C), C46(H46A,H46B,H46C), C47(H47A,H47B,H47C), C48(H48A,
 H48B,H48C)
;
_shelx_res_checksum              3258
_shelx_hkl_checksum              5524
_olex2_submission_special_instructions 'No special instructions were received'