Catalysis by hydrogen halides in the gas phase. XIX. 2,3-Dimethylbutan-2-ol and hydrogen bromide

Abstract

The gas-phase decomposition of 2,3-dimethylbutan-2-ol into 2,3-dimethylbut-1-ene, 2,3-dimethylbut-2-ene, and water, catalysed by hydrogen bromide at 303-400°, is described. The rate is first-order in each reactant and the Arrhenius equation k₂ = ^1011.88 exp(-26490/RT) sec^-l ml mole^-1 is followed. The olefins appear to be in their equilibrium proportions. The effects of substitutions in the alcohol at C_α and C_β on the rate are discussed.