Cyclocopolymerization:: A mechanistic probe for dual-site alternating copolymerization of ethylene and α-olefins

被引：47
|
作者：
Choo, TN [1 ]
Waymouth, RM [1 ]
机构：
[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 16期
关键词：
D O I：
10.1021/ja017707l
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The copolymerization of ethylene with 1,5-hexadiene or 1-hexene was studied with the series of ansa-metallocenes Me2Si(Cp)(9-Flu)ZrCl2 (1), Me2Si(1-Ind)(9-Flu)ZrCl2 (3), and Me2Si(9-Flu)2ZrCl2 (4). 1,5-Hexadiene, a monomer which requires two insertion events to be cyclopolymerized, when copolymerized with ethylene using 3/MAO, gave a copolymer with a novel architecture. When compared with the copolymerization of 1-hexene with ethylene, the observed striking differences between the two copolymers provided compelling evidence for a dual-site alternating copolymerization mechanism in both cases. The copolymerization results from 1/MAO and 4/MAO further support this. Copyright © 2002 American Chemical Society.
引用
收藏
页码：4188 / 4189
页数：2
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