Synthesis, crystal structure of bis(arylamido)lanthanide methyl complexes and their catalytic behavior for the polymerization of methyl methacrylate

被引：16

作者：

Luo, YJ

Yao, YM

Li, WJ

Chen, JL

Zhang, ZQ

Zhang, Y

Shen, Q

机构：

[1] Suzhou Univ, Dept Chem & Chem Engn, Suzhou 215006, Peoples R China

[2] Zhejiang Univ, Ningbo Inst Technol, Dept Biol & Pharmaceut Engn, Ningbo 315104, Peoples R China

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2003年 / 679卷 / 01期

基金：

中国国家自然科学基金;

关键词：

organolanthanide; arylamide ligand; crystal structure; polymerization;

D O I：

10.1016/S0022-328X(03)00545-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reactions of [N(C6H3-i-Pr-2-2,6)(SiMe3)](2)LnCl(THF) (Ln = Nd, Yb) with two equivalents of MeLi in a mixture solution of toluene and Et2O gave [N(C6H3-i-Pr-2-2,6)(SiMe3)](2)LnCH(3)(mu-CH3)Li(THF)(3) (.) PhCH3 (Ln = Nd (1), Yb (2)) in good isolated yields as crystalline solids. The single-crystal structural analysis of 2 revealed that the coordination geometry of ytterbium ion is best described as a distorted pseudo-tetrahedron. Both 1 and 2 are active for the polymerization of methyl methacrylate to give syndiotactic-rich and high molecular weight polymers (Mn > 104) with relatively narrow molecular weight distributions (M-w/M-n < 2). (C) 2003 Elsevier B.V. All rights reserved.

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页码：125 / 129

页数：5

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