Reactions of oxygenated radicals in the gas phase. Part I. Reaction of peracetyl radicals and but-2-ene

Abstract

In the co-oxidation of acetaldehyde and but-2-ene at 393 K, both peracetyl radicals and peracetic acid react with the alkene to form 2,3-epoxybutanes [reactions (1) and (2)]. The proportion of cis- and trans-epoxides >CC< + CH₃CO₃H [graphic omitted] + CH₃CO₂H (1), >CC< + CH₃CO₃· [graphic omitted] +ĊH₃+ CO₂(2) ormed varies with time, the reaction between the alkene and peracetic acid being stereospecific. Two methods of calculating k₁ are used. In one, values of (3·0 ± 0·7)× 10^–2 dm³ mol^–1 s^–1, in the other, values of (3·4 ± 1·0)× 10^–2 dm³ mol^–1 s^–1, are obtained for both alkenes. k₂ is found to be (1·2 ± 0·1)× 10⁵ and (7·5 ± 0·1)× 10⁴ dm³ mol^–1 s^–1 for trans- and cis-but-2-ene, respectively.