Author/Authors :
Aravindakumar، نويسنده , , C.T. and Jacob، نويسنده , , T.A. and Mohan، نويسنده , , H. S. Mahal، نويسنده , , H.S. and Mukherjee، نويسنده , , T. and Mittal، نويسنده , , J.P.، نويسنده ,
Abstract :
CO2·− and (CH3)2·COH radicals apparently react with uracil and its derivatives, containing two carbonyl groups, with high rate constants (k=1010 dm3 mol−1 s−1). Various mechanistic aspects of such reactions have been probed. The effect of pH and buffer concentration on the initial formation of absorbance points to some keto-enol tautomerism-type fast-reaction between OH− and the substrate, followed by a slower relaxation to the original equilibrium. The radical anions of these compounds react with methyl viologen mainly via an electron transfer reaction with a high rate constant value (4–9)×109 dm3 mol−1 s−1.
