Catalysis by hydrogen halides in the gas phase. XXIV. 2,2-Dimethoxypropane and hydrogen chloride

Abstract

The decomposition of 2,2-dimethoxypropane to methyl isopropenyl ether and methanol in the gas phase is catalysed by hydrogen chloride in c. 1% proportion at 226-364°C. The reaction is first order in each reactant and rates are given by the equation k_z = 2.3 x 10¹³ exp(-22200/RT) (s^-1 ml mol^-1) The possibility of the reaction being a radical chain or surface one is discussed. However, it is believed to be homogeneous and molecular.