文献类型：期刊文献

英文题名：Synthesis, structure characterization and catalytic activity of lanthanide complexes containing an ansa carbonous-bridged cyclopentadienyl - Thienyl ligand

作者：Xie, Xiaomin[1]; Huang, Jiling[1]

机构：[1] Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China

年份：2009

卷号：23

期号：1

起止页码：1

外文期刊名：Applied Organometallic Chemistry

收录：EI(收录号：20090311859400)

语种：英文

外文关键词：Polymerization - Esters - Hydrides - Ligands - Sodium compounds - Acrylic monomers - Chelation - Synthesis (chemical)

摘要：A kind of new lanthanocene complex with an ansa carbonous-bridged cyclopentadienyl/aromatic heterocycle ligand was prepared and characterized. Based on the data of elemental analyses, MS and IR, they were presumed to be solvent-free complexes (Cyclo-C4H3SCMe2C 5H4)2LnCl [Ln=Er (1), Dd (2), Y (3), Sm (4)]. These complexes were effective for the polymerization of methyl methacrylate in the presence of co-catalyst. When AlEt3 and NaH (nanometric) were used as different co-catalysts, the lanthanocene complexes 1-4 showed different catalytic behavior. These differences resulted from the formation of different active species. The catalyst system (cyclo-C4H3SCMe 2C5H4)2LnCI/NaH (nanometric) showed high catalytic activity (yield ≥95% and Mη > 105) in a short time at the ambient temperature. Copyright ? 2008 John Wiley & Sons, Ltd.