Isobutene polymerization using a chelating diborane co-initiator

被引：89

作者：

Lewis, SP

Taylor, NJ

Piers, WE

Collins, S ^{[1
]}

机构：

[1] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA

[2] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada

[3] Univ Calgary, Dept Chem, Calgary, AB T2V 2R3, Canada

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 48期

关键词：

D O I：

10.1021/ja037725y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lewis acidic diborane 1 (J. Am. Chem. Soc. 1999, 121, 3244?3245) is highly effective for both proton- and cationogen-initiated isobutene polymerization in hydrocarbon media at low temperature. Reactions of diborane 1 with cumyl chloride and cumyl methyl ether were studied by variable-temperature 1H and 19F NMR spectroscopy. At low temperatures stable ion pairs 2a and 2b are formed; at higher temperatures these ion-pairs form phenyl-1,3,3-trimethylindan (3) with concomitant release of HCl to form 1 in the case of 2a or degradation of the anion (2b). Reaction between Ph3C-Cl and diborane 1 resulted in the generation of an ion-pair 4 consisting of the Ph3C cation very weakly associated with the chelated, μ-Cl counteranion as revealed by X-ray crystallography. Copyright © 2003 American Chemical Society.

引用

页码：14686 / +

页数：2

共 33 条

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