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Gas phase oxidation of alkenes—Part II. The oxidation of 2-methylbutene-2 and 2,3-dimethylbutene-2

✍ Scribed by D.J.M. Ray; D.J. Waddington

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
654 KB
Volume
20
Category
Article
ISSN
0010-2180

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✦ Synopsis

The initial rate of oxidation of ttans-butene-2, 2-methylbutene-2, and 2,3dimethylbutene-2, increases with the number of methyl groups adjacent to the carbon-carbon double bond, suggesting that there is increasing facility of hydrogen atom abstraction from the methyl groups. On the other hand, the muximum rate of oxidation decreases as th: alkene becomes more substituted and as the concentration of acetaldehyde formed is reduced. Result.: are explained in terms of reactions involving the addition of hydroxyl radicals, followed by oxygen, to the alkene, the resulting substituted peroxy radicals undergoing decomposition to form carbonyl compounds with the regeneration of the chain carrier. Epoxides appear to be formed by the addition of X02 -radicals to the alkene followed by ring closure; this reaction also regenerates chain carriers.

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