Synthesis and characterization of lanthanide complexes stabilized by N -aryl substituted β -ketoiminato ligands and their application in the polymerization of rac -lactide
作者:Qiaolang Xia、Yu Cui、Dan Yuan、Yaorong Wang、Yingming Yao
DOI:10.1016/j.jorganchem.2017.06.002
日期:2017.10
Several lanthanide complexes supported by N-aryl substituted β-ketoiminato ligands were synthesized by the protonolysis reaction. Reactions of 1-phenyl-3-N-(p-methoxyphenylimino)-1-butanone (HL) with Ln[N(SiMe3)2]3 and Ln(OAr)3(THF) (ArO = 2,6-But2-4-MeC6H2O) in a 2:1 M ratio gave mononuclear lanthanide amides L2Ln[N(SiMe3)2] [Ln = Y (1), Sm (2), Nd (3)] and aryloxides L2Ln(OAr) [Ln = Y (4), Nd (5)]
通过质子分解反应合成了由N-芳基取代的β-酮亚氨基配体支撑的几种镧系元素配合物。1-苯基-3 - N-(对甲氧基苯基亚氨基)-1-丁酮(HL)与Ln [N(SiMe 3)2 ] 3和Ln(OAr)3(THF)(ArO = 2,6-Bu t 2 -4-MeC 6 H 2 O)以2:1 M的比例得到单核镧系酰胺L 2 Ln [N(SiMe 3)2 ] [Ln = Y(1),Sm(2),Nd(3) ]和芳基氧化物L 2Ln(OAr)[Ln = Y(4),Nd(5)]分别,而与Yb [N(SiMe 3)2 ] 3的相同反应提供了出乎意料的均化complex络合物L 3 Yb(6)。镧系元素配合物1-6的固态结构通过单晶X射线衍射确定。结果发现,复合物1 - 5能有效引发的开环外消旋的THF丙交酯,得到富hetereotactic-聚交酯。