Synthesis, Characterization and Application of Benzyl-substituted Cyclopentadienyl lanthanide Complexes as Catalyst Precursors for the Syndiotactic Polymerization of Methyl Methacrylate  

作　　者：钱延龙 BALA Muhammad D. 谢小敏 黄吉玲 

机构地区：[1]Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China

出　　处：《Chinese Journal of Chemistry》2004年第6期568-572,共5页中国化学（英文版）

基　　金：Project supported by the Major State Basic Research Development Program (No. G1999064801); and the National Natural Science Foundation of China (Nos. 20072004 and 29871010).

摘　　要：Yan-LongBALA, Muhammad D. XIE, Xiao-Min(HUANG, Ji-Ling*Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China Benzyl-substituted cyclopentadienyl lanthanide complexes were synthesized and characterized by elemental analysis, MS and IR spectroscopy. The analytical data point out the formation of monomeric, unsolvated complexes. In conjunction with Al(Et)3 as co-catalyst, the title complexes are efficient catalysts for the syndiotactic polymeriza-tion of methyl methacrylate. For the complex (C6H5CH2C5H4)2YCl, under the optimum polymerization conditions (60 ℃, n(MMA)∶n(catalyst)∶n(co-catalyst)=1000∶1∶10), a predominantly syndiotactic (rr=66%) polymer of high molecular weight (Mh=105000) was obtained.Yan-LongBALA, Muhammad D. XIE, Xiao-Min(HUANG, Ji-Ling*Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China Benzyl-substituted cyclopentadienyl lanthanide complexes were synthesized and characterized by elemental analysis, MS and IR spectroscopy. The analytical data point out the formation of monomeric, unsolvated complexes. In conjunction with Al(Et)3 as co-catalyst, the title complexes are efficient catalysts for the syndiotactic polymeriza-tion of methyl methacrylate. For the complex (C6H5CH2C5H4)2YCl, under the optimum polymerization conditions (60 ℃, n(MMA)∶n(catalyst)∶n(co-catalyst)=1000∶1∶10), a predominantly syndiotactic (rr=66%) polymer of high molecular weight (Mh=105000) was obtained.

关 键 词：benzyl-cyclopentadiene organolanthanide complex methyl methacrylate syndiotacticity polym-erization 

分 类 号：O643.3[理学—物理化学]