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Photolysis of 4-chloroanisole in the presence of oxygen: Formation of the 4-methoxyphenylperoxyl radical

Paper ID Volume ID Publish Year Pages File Format Full-Text
29063 44117 2006 5 PDF Available
Title
Photolysis of 4-chloroanisole in the presence of oxygen: Formation of the 4-methoxyphenylperoxyl radical
Abstract

The photochemistry of 4-chloroanisole was studied in cyclohexane, with and without molecular oxygen. The triplet state is the main transient in argon purged solutions. In air equilibrated conditions the triplet state was not detected and a new broad absorption band was observed above 450 nm. This absorption was assigned to the 4-methoxyphenylperoxyl radical. The formation of phenylperoxyl radicals after direct photolysis of the parent chlorinated compound in the presence of oxygen is reported here for the first time. Anisole is one of the main photoproducts in both conditions. Bicyclohexane was detected only in argon purged conditions while cyclohexyl ether is only formed in the presence of molecular oxygen. The formation of phenylperoxyl radicals after direct photolysis of chloroaromatics can be used to detect the homolytic cleavage of the C–Cl bond.

Keywords
Methoxyphenylperoxyl radical; Methoxyphenyl radical; Transient absorption; Photodegradation products
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Photolysis of 4-chloroanisole in the presence of oxygen: Formation of the 4-methoxyphenylperoxyl radical
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 182, Issue 1, 20 August 2006, Pages 88–92
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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