期刊
INORGANIC CHEMISTRY
卷 58, 期 1, 页码 218-227出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.8b02290
关键词
-
资金
- National Natural Science Foundation of China [21671087]
A series of mononuclear salen-sodium anions, as the first examples, were synthesized with tetra-alkyl ammonium as a counterpart cation. These complexes are efficient catalysts for the isoselective ring-opening polymerization of rac-lactide; the molecular weights of polymers are under control and molecular weight distributions are narrow when five equivalents of BnOH is used as an initiator. The best isoselectivity value of P-m = 0.82 was achieved at -70 degrees C. The experimental results together with a density functional theory calculation show that a ligand-assisted activated monomer mechanism is more reasonable than an activated monomer mechanism for this system.
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