1015-1023The electrochemical
oxidation of 6-hydroxy-2,4,5-triaminopyrimidine (<b style="mso-bidi-font-weight:
normal">I) at pyrolytic graphite
electrode has been studied in phosphate buffers of <i style="mso-bidi-font-style:
normal">pH range 2.5-10.8. Under cyclic voltammetric conditions, the 2e, 2H+
oxidation of this compound is found to give alloxan, which has been
characterized on the basis of IR, mass and NMR spectral data. The kinetics of
the decay of the UV -absorbing intermediate generated during electrooxidation
of compound (I) has been studied and
first order rate constants for the disappearance of UV -absorbing intermediate
have been calculated. A tentative mechanism in which electrode reaction is followed
by chemical steps (EC) for the oxidation of <b style="mso-bidi-font-weight:
normal">I has also been suggested.</span