Lewis acid addticts of α,β-unsaturated carbonyl and nitrile compounds. A calorimetric study
- 15 March 1982
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 60 (6) , 809-812
- https://doi.org/10.1139/v82-118
Abstract
Enthalpies of complexation of the α,β-unsaturated Lewis bases crotonaldehyde, 1; methyl crotonate, 2; mesityl oxide, 3; and crotononitrile, 4; with each of the Lewis acids SnCl4, TiCl4, SbCl5, and BCl3 were measured in solution in CH2Cl2. The results indicate that while a qualitative agreement exists in the ranking of Lewis acids for each of the Lewis bases, there is only a modest quantitative correlation. Similarly, when compared with an nmr-derived Lewis acid scale, the enthalpies were found to agree with the qualitative ranking of Lewis acids, but exhibited only a poor correlation.Keywords
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