TRACER STUDIES OF ACID-CATALYZED REACTIONS .9. EXCHANGE OF D2 WITH NONCYCLIC OLEFINS OVER ALUMINA

被引：48

作者：

HIGHTOWER, JW

HALL, WK

机构：

[1] Carnegie-Mellon University, Mellon Institute, Pittsburgh

来源：

JOURNAL OF CATALYSIS | 1969年 / 13卷 / 02期

关键词：

D O I：

10.1016/0021-9517(69)90388-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The mechanism of deuterium exchange with hydrogen atoms in small noncyclic olefins has been investigated over a pure alumina catalyst. In reactions of 1-butene, cis-2-butene, isobutene, and tert-butylethylene with D2, only the vinyl CH bonds underwent exchange below 100 °C. The exchange occurred most readily with terminal vinyl hydrogen atoms of α-olefins and probably involved a dissociative mechanism on acid-base or ion-pair sites on the dehydroxylated surface. Isomerization and exchange were independent processes. NMR studies of the products obtained at two different temperatures showed that the activation energy for the exchange reaction in isobutene was considerably lower than that for double-bond migration. © 1969.

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页码：161 / +

页数：1

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