Phototransformation of linuron and chlorbromuron in aqueous solution

The main photoproducts initially formed in the phototransformation of linuron and chlorbromuron in aqueous solution result from photohydrolysis, i.e. hydroxylation with release of halide ion, and from elimination of a methoxy group. Reductive debromination was also observed with chlorbromuron The tr...

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Bibliographic Details
Published inPesticide Science Vol. 51; no. 4; pp. 413 - 418
Main Authors Faure, V, Boule, P
Format Journal Article
LanguageEnglish
Published Oxford London :John Wiley & Sons Ltd 01.12.1997
Subjects
chemical reactions
chemical structure
chlorbromuron
linuron
metabolites
photolysis
wavelengths
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Summary:The main photoproducts initially formed in the phototransformation of linuron and chlorbromuron in aqueous solution result from photohydrolysis, i.e. hydroxylation with release of halide ion, and from elimination of a methoxy group. Reductive debromination was also observed with chlorbromuron The transformation is less specific than with diuron. The orientation of the reaction depends on the wavelength: short wavelengths (254 nm) favour demethoxylation and photohydrolysis in the meta position whereas, with 'black light', i.e. wave-lengths longer than 330 nm, photohydrolysis in the para position is the main reaction observed.
ISSN:0031-613X
1526-498X
1096-9063
DOI:10.1002/(SICI)1096-9063(199712)51:4<413::AID-PS671>3.0.CO;2-9