RADIOLYTIC REDUCTION OF ETHYLENE TRITHIOCARBONATE - A PULSE-RADIOLYSIS STUDY

The reaction of e(aq)- with ethylene trithiocarbonate in aqueous medium has been investigated employing pulse radiolysis technique. The bimolecular rate constant for the reaction has been obtained as 3 x 10(10) dm3 mol-1s-1. A transient absorption spectrum, with lambda(max) at 315 nm, has been observed which is assigned to the neutral radical formed by the protonation of radical anion produced in the reaction of e(aq)- with ETTC. A similar absorption spectrum was also observed under the condition where the H atom instead of e(aq)- reacts with ETTC. The transient decayed by second-order kinetics with k2 = (9.1 +/- 1.0) x 10(8) dm3 mol-1s-1. The G(-ETTC) has been determined from Co-60 gamma-radiolysis as 3.1.