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Photolysis of 2,6 di-tert-butyl-4-tert-butylperoxy-4-methyl-2,5-cyclohexadienone

✍ Scribed by J. Pilaǎ; J. Kovářová; J. Pospíšil

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
355 KB
Volume
14
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The photolysis of a heptane solution of 2,6‐di‐tert‐butyl‐4‐tert‐butylperoxy‐4‐methyl‐ 2,5‐cyclohexadienone (1) with light of 360–480 nm in the presence of 2,6‐di‐tert‐butyl‐4‐methylphenol or 2,4,6‐tri‐tert‐butylphenol gives rise to their corresponding phenoxyls in a reaction with the tert‐butoxyl arising in the photolysis. Direct evidence of the formation of t‐BuO^.^ by the photolysis of 1 was provided by the ESR characterization of spin‐adducts of this radical with nitrosobenzene and nitrosodurene. Evidence of the photolysis of the peroxide bond in 1 is important for the mechanism of reaction of phenolic chain‐breaking antioxidants.

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