Binuclear Scandium Initiators for the Syndiospecific Triblock Copolymerization of Styrene with ε-Caprolactone
Wang, Yang; Zhou, Chulu; Cheng, Jianhua; Macromolecules  (2020) –; doi:10.1021/acs.macromol.9b02602

data_1557965
_publ_section_title
;
 Binuclear Scandium Initiators for the Syndiospecific Triblock
 Copolymerization of Styrene with \e-Caprolactone
;
_journal_name_full               Macromolecules
_journal_paper_doi               10.1021/acs.macromol.9b02602
_journal_year                    2020
_chemical_formula_moiety         'C25 H41 Cl N O Sc Si'
_chemical_formula_sum            'C25 H41 Cl N O Sc Si'
_chemical_formula_weight         480.09
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   iterative
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 101.1280(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.8573(13)
_cell_length_b                   8.7978(7)
_cell_length_c                   20.6966(18)
_cell_measurement_reflns_used    4624
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      26.12
_cell_measurement_theta_min      2.52
_cell_volume                     2654.4(4)
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 2014)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2018)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SUPERFLIP (Palatinus & Chapuis,2007)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_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  0.0279
_diffrn_reflns_av_unetI/netI     0.0324
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            13165
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        24.999
_diffrn_reflns_theta_max         24.999
_diffrn_reflns_theta_min         1.397
_exptl_absorpt_coefficient_mu    0.439
_exptl_absorpt_correction_T_max  0.945
_exptl_absorpt_correction_T_min  0.924
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
'Sheldrick, G. M. SADABS, Version 2.10; Bruker AXS, Inc.: Madison, WI 2003.'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.201
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.210
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.130
_refine_diff_density_max         0.555
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.062
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4661
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0603
_refine_ls_R_factor_gt           0.0499
_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^)+(0.0825P)^2^+1.3287P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1329
_refine_ls_wR_factor_ref         0.1427
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3824
_reflns_number_total             4661
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ma9b02602_si_002.cif
_cod_data_source_block           D195
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1557965
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.913
_shelx_estimated_absorpt_t_max   0.945
_shelx_res_checksum              78268
_shelx_hkl_checksum              64725