J. Skopalova et al., ELECTROCHEMICAL REDUCTION OF PROMETRYNE AND THE OTHER 2-METHYLTHIO-4,6-DIALKYLAMINO-S-TRIAZINE HERBICIDES AT MERCURY-ELECTRODES, Electroanalysis, 10(5), 1998, pp. 331-335
The electrochemical behavior of the herbicide prometryne was studied i
n aqueous solutions by DC polarography, differential pulse and cyclic
voltammetry and by constant potential coulometry. Only the protonated
form of prometryne can be reduced at pH < 6.5. The electrode process i
ncludes two irreversible steps. The two-electron reduction of the C-S
bond leads to its splitting and a release of methylthiol molecule. The
triazine ring of the reduction product is immediately reduced under t
he uptake of two electrons. Both the intermediate and final products o
f constant potential electrolysis were identified using chromatographi
c techniques and mass spectrometric analysis. The reduction mechanism
of other 2-methylthio-4,6-dialkylamino-s-triazines is identical.