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Phototransformation of linuron and chlorbromuron in aqueous solution

✍ Scribed by Faure, Valérie; Boule, Pierre

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
231 KB
Volume
51
Category
Article
ISSN
1526-498X

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✦ Synopsis

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 speciÐc 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 lightÏ, i.e. wavelengths longer than 330 nm, photohydrolysis in the para position is the main reaction observed.

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