
%0 Journal Article
%A Cross, JTD 
%A Stimson, VR 
%T Catalysis by hydrogen halides in the gas phase. XVII. Isobutyric acid and hydrogen bromide
%J Australian Journal of Chemistry
%D 1968/03/01
%V 21
%N 3
%P 725-732
%K 
%R https://doi.org/10.1071/CH9680725
%U https://www.publish.csiro.au/paper/CH9680725 
%X Hydrogen bromide catalyses the decomposition of isobutyric acid into   propene, carbon monoxide, and water at 369-454º. Hydrogen bromide is not lost. Individual runs follow the first-order rate law, and the rate constants are proportional to the hydrogen bromide pressure. The Arrhenius parameters are: E = 33.17 kcal mole-1 and A = 1012.87 sec-1 ml mole-1, and the reaction is homogeneous and molecular. Added water or methanol retards the reaction. 
