Comparison of the kinetic and molecular parameters for the dehydrogenation of 3-pyrroline, cyclohexa-1,3-diene, cyclohexene, 2,5-dihydrothiophen, 2,5-dihydrofuran, and 2-methyl-2,5-dihydrofuran (compounds of the type CH2·CH:CH·CHY·X), including results for the pyrolysis of 2,5-dihydrothiophen

Abstract

The mechanism for the decomposition of compounds of the type [graphic omitted] is discussed and the kinetic parameters are correlated with the molecular parameters. Preliminary experiments on the decomposition of 2,5-dihydrothiophen show that for the formation of thiophen and hydrogen, the first-order rate constant is given by k₁= 10^{13·22 ± 0·61} exp(54,800 ± 3500/RT) where R= 1·9865 cal deg^–1 mol^–1[k₁= 10^{13·22 ± 0·61} exp (229,000 ± 15,000/RT) where R= 8·3143 J mol^–1 deg^–1].