I. Hadzistelios, H. J. Sideri-Katsanou, N. Katsanos
Oct 1, 1972
Citations
0
Influential Citations
11
Citations
Journal
Journal of Catalysis
Abstract
Abstract Dehydrohalogenation reactions of bromobutanes on alumina modified with potassium bromide were studied by the stopped-flow technique. Isomerization and polymerization reactions of the products were kept to a minimum. The reactions were first-order with respect to the reactant. From 1-bromobutane all four possible alkenes were produced, 1-butene being the main product. From 1-bromo-2-methyl-propane almost exclusively 2-methylpropene was obtained, whereas 2-bromobutane gave cis- and trans-2-butene in about equal amounts. The heat of adsorption of the first two bromides was determined and this was correlated with the Arrhenius parameters to interpret the compensation effect observed. From this correlation certain conclusions about the mechanism of the reactions are drawn. The results are consistent with a two-step mechanism, the second step being rate determining.