均配型三[2-(二甲胺基)苄基]钕配合物的合成、表征及在催化L-丙交酯聚合中的应用

Synthesis,Characterization of Homoleptic Tris(o-Dimethylaminobenzyl) Neodymium Complex and Its Application in the Polymerization of L-Lactide

在无水无氧的条件下,利用2-(二甲胺基)苄基钾盐KR(R=CH2C6H4-NMe2-o)与三氯化钕反应制得相应的均配型的三[2-(二甲胺基)苄基]钕稀土配合物NdR3,并培养出单晶。通过元素分析、IR和X-射线单晶衍射表征了其结构,配合物NdR3属单斜晶系,P21/c空间群,a=1.710 01(19)nm,b=0.949 54(9)nm,c=1.678 27(18)nm,β=110.776(2)°,Z=4,V=2.547 8(5)nm3,R=0.037 1,wR=0.079 2。该配合物的中心金属Nd为六配位,几何构型为三棱柱型。配合物NdR3能够有效地催化L-丙交酯的开环聚合。

A homopleptic tris（o-dimethylaminobenzyl） complex NdR3 （R=CH2C6H4-NMe2-o） has been prepared by the reaction of anhydrous NdC13 and KR under pure argon with rigorous exclusion of air and moisture using standard Schlenk techniques, and characterized by IR, elemental analysis and X-ray structure determination. The crystal for NdR3 belongs to monoelinic system, space group P21/c with a=1.71001（19） nm, b=0.949 54（9） nm, c= 1.678 27（18） nm,β=110.776（2）°, Z=4, V=2.547 8（5） nm3, R=0.037 1, wR=0.079 2. The crystal structure shows three bidendate benzyl ligands bound to Nd, which has a prismatic coordination sphere. It was found that tris（o- dimethylaminobenzyl） neodymium complex can be used as an efficient initiator for the ring-opening polymerization of L-lactide. CCDC： 829209.