Identification of different products obtained by electrochemical and photochemical reduction of the herbicide metamitron

✍ Scribed by Carlos Olmedo; Luis Deban; Enrique Barrado; Yolanda Castrillejo; Luis Herrero

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 391 KB
• Volume: 39
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/s0013-4686(94)85071-2

✦ Synopsis

The electrochemical reduction of the herbicide Metamitron (4-amino_4,5dihydro-3-methyl& phenyl-1,2,4-triazin-5-one) has been carried out at different pHs using a mercury pool cathode. The iinal product of these reductions depends both on the electrolysis potential and on the pH. All processes are irreversible and the reductions of the C-N and the N-NH, (pH > 3) or N-NH: bond @H < 3) are inferred.

An aqueous solution of Metamitron is also degraded by sunlight leading to 4,5dihydro-3-methyl&phenyl-1,2,4-triazin-5-one (deaminometamitron). This reaction can be monitored polarographically.