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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Ultraviolet absorption spectra of the 2-Phenylethyl radical formed during pulse radiolysis

NA McAskill and DF Sangster

Australian Journal of Chemistry 34(4) 721 - 726
Published: 1981

Abstract

2-Phenylethyl radicals (Ph-CH2-·CH2) were prepared by the decarboxylation reaction of 3-phenylpropanoic acid with sulfate radical ions (SO4-·) formed during the pulse radiolysis of aqueous solutions containing peroxydisulfate (S2O82-) ions. The ultraviolet absorption spectrum of the transient radicals consisted of a band centred at 309nm with an extinction coefficient of 5000 1, mol-1 cm-1. Attempts were made to form phenylethyl radicals by the electron-attachment dissociation reaction of (2-haloethy1)benzenes. Contrary to literature reports, it was found that the latter reaction does not occur in either cyclohexane, benzene or aqueous solutions of (2-chloroethyl)- and (2-bromoethyl)-benzenes.

https://doi.org/10.1071/CH9810721

© CSIRO 1981

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