Kinetic and mechanistic aspects of the direct photodegradation of atrazine, atr...

• Author(s): Azenha, M. E. D. G. ; Burrows, H. D. ; L., M. Canle ; Coimbra, R. ; Fernández, M. I. ; García, M. V. ; Peiteado, M. A. ; Santaballa, J. A.
• Date: 2003
• Persistent ID: http://hdl.handle.net/10316/8296
• Origin: Estudo Geral - Universidade de Coimbra
• Document Type: Article
• Language: English

Description

Atrazine (1), Atraton (2) and Ametryn (3) are photodegraded upon 254 nm irradiation, yielding 2-OH-atrazine (4) as a photoproduct. Dealkylation products are also generated, and 4-ethylamino-6-isopropylamino-(1,3,5)-triazine was also found as a photoproduct of 3. The main photoreaction is proposed to be an addition-elimination, yielding 4, which subsequently photodegrades. The ease of photodegradation depends on the electron availability at position C-2, the observed order of photoreactivity being 1 > 3 > 4 > 2. Copyright © 2003 John Wiley & Sons, Ltd. http://dx.doi.org/10.1002/poc.624