Stereo-selectivity switchable ROP of rac-β-butyrolactone initiated by salan-ligated rare-earth metal amide complexes: the key role of the substituents on ligand frameworks.
Zhuo, Zhixing; Zhang, Chen; Luo, Yunjie; Wang, Yaorong; Yao, Yingming; Yuan, Dan; Cui, Dongmei; Chemical communications (Cambridge, England) 54 (2018) 11998–12001; doi:10.1039/c8cc05469j

data_7125341
_publ_section_title
;
 Stereo-selectivity switchable ROP of rac-\b-butyrolactone initiated by
 salan-ligated rare-earth metal amide complexes: the key role of the
 substituents on ligand frameworks.
;
_journal_issue                   85
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              11998
_journal_page_last               12001
_journal_paper_doi               10.1039/c8cc05469j
_journal_volume                  54
_journal_year                    2018
_chemical_formula_sum            'C99 H176 N6 O4 Si4 Yb2'
_chemical_formula_weight         1972.89
_chemical_properties_physical    Air-sensitive,Moisture-sensitive
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
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_atom_sites_solution_hydrogens   geom
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_audit_update_record
;
2018-06-29 deposited with the CCDC.
2018-08-28 downloaded from the CCDC.
;
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_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.29
_cell_volume                     2641.9(8)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
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_diffrn_measured_fraction_theta_max 0.993
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_diffrn_radiation_type           MoK\a
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_diffrn_reflns_av_unetI/netI     0.0307
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_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
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_diffrn_reflns_theta_min         2.259
_exptl_absorpt_coefficient_mu    1.852
_exptl_absorpt_correction_T_max  0.7083
_exptl_absorpt_correction_T_min  0.4028
_exptl_crystal_colour            yellow
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_exptl_crystal_description       block
_exptl_crystal_F_000             1040
_refine_diff_density_max         1.429
_refine_diff_density_min         -1.580
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_refine_ls_extinction_method     none
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0255P)^2^+7.8790P] where P=(Fo^2^+2Fc^2^)/3'
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_reflns_threshold_expression     'I > 2\s(I)'
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_cod_original_cell_volume        2642.0(8)
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