DETERMINATION OF THE ACIDITY OF LEWIS-ACIDS

被引：126
作者：
LASZLO, P
TESTON, M
机构：
[1] Laboratoire de Chimie Fine aux Interfaces Ecole Poly technique, 91128, Palaiseau Cedex
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1990年 / 112卷 / 24期
关键词：
D O I：
10.1021/ja00180a017
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The chemical shift (H-3) of crotonaldehyde complexed by a Lewis acid provides a measure of its strength as a catalyst, according to R. F. Childs, D. L. Mulholland, and A. Nixon, (Can. J. Chem. 1982, 60, 801-808). A theoretical justification was highly desirable and is provided here: the experimental method works because of the linear dependence of the H-3 chemical shift on the energy of the lowest π⋆ MO in the complex. While the experimental determination has some drawbacks (problems of precise concentration, solubility, impurities, and availability), MO calculations appear trustworthy and have some advantages for the estimation of the catalytic activity of a Lewis acid. © 1990, American Chemical Society. All rights reserved.
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收藏
页码：8750 / 8754
页数：5
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