Direct observation of insertion events at rac-(C2H4(1-indenyl)2)Zr(MeB(C6F5)3)-polymeryl intermediates:: Distinction between continuous and intermittent propagation modes

被引：82

作者：

Landis, CR ^{[1
]}

Rosaaen, KA ^{[1
]}

Sillars, DR ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 07期

关键词：

D O I：

10.1021/ja028070o

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The propagating species for 1-hexene, propene, and ethene polymerization as catalyzed by [rac-(C2H4(1-indenyl)2)Zr(CH3)][CH3B(C6F5)3] has been intercepted at T < -40 °C and characterized by NMR methods. Observation of the propagating species permits direct monitoring of initiation, propagation, and termination processes by NMR. Detailed examination of alkene incorporation into Zr-polymeryl species using 13C-labeled 1-alkenes supports a continuous insertion mechanism whereby the anion re-coordinates after each alkene insertion. Copyright © 2003 American Chemical Society.

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页码：1710 / 1711

页数：2

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