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Fungicides and photochemistry photodegradation of the dicarboximide fungicide procymidone






Chemosphere. 31(9): 4033-4040

Fungicides and photochemistry photodegradation of the dicarboximide fungicide procymidone

The photoreactivity of the dicarboximide fungicide procymidone (1) (3-(3,5-dichlorophenyl)-1,5-dimethyl-3-azabicyclo(3.1.0)hexane-2,4-dione) on plant surfaces was studied by irradiation experiments in different organic solvents simulating the plant cuticle environment. Photodegradation (lambda gt 280 nm) increased in the order isopropanol, cyclohexane, cyclohexene. In the presence of isopropanol or cyclohexane, mainly photodehalogenation reactions were observed, which, to a minor extent, competed with substitutions by solvent molecules. In the presence of cyclohexene, however, substitution of a phenyl-Cl by the solvent was strongly preferred and the monodehalogenated procymidone was only found in low percentages.

Accession: 008712553

DOI: 10.1016/0045-6535(95)80004-5

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