Synthesis and characterization of aminophenolate-ligated rare-earth metal amide complexes and their catalytic activity for lactides polymerization

作者：Min Li,Wenyi Li,Yingming Yao,Yunjie Luo

摘要：Amine elimination of Ln[N(SiMe3)2]3(μ-Cl)Li(THF)3 with aminophenol H[ON]{H[ON]=2-(CH2 NC5 H10)-4,6-tBu2-C6 H3OH}in 1:2 molar ratio in THF gave the monometallic rare-earth metal amide complexes[ON]2 LnN(SiMe3)2(Ln=Yb(1),Y(2),Gd(3),Sm(4),Nd(5))in 57%-73%isolated yields.All these complexes were characterized by elemental analysis.The molecular structures of complexes 1-4 were determined by single crystal X-ray diffraction.These complexes are highly active for L-Iactide polymerization to give high molecular weight polymers with unimodal molecular weight distributions.In addition,these complexes can also initiate rac-lactide polymerization with high activity to afford heterotactic-rich polylactides.

發文機構：School of Material Science and Chemical Engineering College of Chemistry State Key Laboratory of Polymer Physics and Chemistry

關鍵詞：Rare-earthmetalcomplexAminophenolateligandPOLYMERIZATIONLACTIDE

分類號： O641.4[理學—物理化學]O631.5[理學—化學]