Reactive Intermediates Formed During Olefin Polymerization by Methylalumoxane-Activated ansa-Zirconocene Catalysts: Identification of a Chain-Carrying Intermediate by NMR Methods

被引：32

作者：

Babushkin, Dmitrii E. ^{[1
]}

Brintzinger, Hans H. ^{[2
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, RU-630090 Novosibirsk, Russia

[2] Univ Konstanz, Fachbereich Chem, D-78457 Constance, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 02期

关键词：

PROPENE POLYMERIZATION; ALKENE POLYMERIZATION; CATIONIC ZIRCONIUM; ION-PAIRS; COMPLEXES; PROPAGATION; DORMANT; ALKYLS; ZR;

D O I：

10.1021/ja909157r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Addition of 1-hexene to methylalumoxane-activated catalyst systems based on rac-Me2Si(ind)(2)ZrMe2 causes, concurrent with polyhexene formation and diminution of the otherwise prevalent cation [rac-Me2Si(ind)(2)-Zr(mu-Me)(2)AlMe2](+), formation of a hitherto unobserved species [rac-Me2Si(ind)(2)Zr(mu-R)(mu-Me)AlMe2](+), where R is a Zr-bound polyhexyl chain. As hexene is increasingly consumed, this cation decays, mainly back to [rac-Me2Si(ind)(2)Zr(mu-Me)(2)AlMe2](+) and, in part, to some species containing a Zr-bound allylic chain end.

引用

页码：452 / +

页数：4

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