Tritium isotopic exchange between hydrogen sulfide and thiols in gas phase

It has been established that the rate constant of tritium isotopic exchange between hydrogen sulfide and thiols within the temperature range 293-333K is given by k[dm3.mole-1.s-1]=p.exp[-6000[J.mole-1]/RT] where p are (6+-1.7)x10-2, (4.6+-0.5)x10-2, (3.8+-0.7)x10-2, (7.1+-1.2)x10-3 for methyl, ethyl, n-propyl, i-propyl thiol, respectively. The total order of the reaction is equal to 2, and the partial orders in respect to H2S and thol are equal to 1. The mechanism of the isotopic exchange is discussed. (author)