节点文献
Synthesis, Structure and Catalytic Activity Comparison of Tris-and Tetracoordinated Lanthanide Amides
【Abstract】 Tetracoordinated lanthanide amides [(Me3Si)2N]3Ln (m-Cl)Li(THF)3 (Ln=La (1), Pr (2)) were synthesized by the reaction of anhydrous lanthanide(III) chlorides LnCl3 (Ln=La, Pr) with 3 equiv. of lithium bis(trimethylsilyl)amide (Me3Si)2NLi in THF, followed by recrystallization from toluene. Sublimation of 1 and 2 afforded the triscoordinate lanthanide amides [(Me3Si)2N]3Ln (Ln=La, Pr). The crystal structure of 2 was determined by X-ray diffraction analysis. The catalytic activity studies show that the tetracoordinate amides can be used as single-component MMA (methyl methacrylate) polymerization catalysts, while the triscoordinate amides showed poor activity on MMA polymerization under the same conditions.
【关键词】 synthesis;
lanthanide;
catalyst;
MMA;
polymerization;
【Key words】 synthesis; lanthanide; catalyst; MMA; polymerization;
【Key words】 synthesis; lanthanide; catalyst; MMA; polymerization;
【基金】 Project supported by the National Natural Science Foundation of China (Nos. 20072001 and 20271003); the Excellent Young Scholars Foundation of Anhui Province and Education Department of Anhui Province.
- 【文献出处】 Chinese Journal of Chemistry ,中国化学(英文版) , 编辑部邮箱 ,2004年07期
- 【分类号】O643.3
- 【被引频次】5
- 【下载频次】10