Alcohol dehydration. Isotope studies of the conversion of 3-pentanol

被引:22
作者
Shi, BC [1 ]
Dabbagh, HA [1 ]
Davis, BH [1 ]
机构
[1] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA
关键词
3-pentanol; dehydration; alumina; kinetic isotope effect (KIE; k(H)/k(D)); isotopic tracer studies;
D O I
10.1016/S1381-1169(98)00269-6
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
Three deuterated 3-pentanols and undeuterated 3-pentanol were converted using an alumina catalyst. Similar values of the kinetic isotope effect (KIE; k(H)/k(D)) were obtained for the rate of conversion of 3-pentanol and the rate of H(D) removal in forming the alkene products. The data support a catalytic dehydration mechanism that involves a concerted removal of H(D) from the -CH2-xDx group and OH (or O) from the carbinol carbon and with a timing such that the transition state resembles neither a carbonion-like nor carbenium-like species. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:257 / 262
页数:6
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