Tritium isotope fractionation between ammonia, methylamine, dimethylamine and n-butane thiol

Abstract

Isotope exchange between ammonia, methylamine and dimethylamine on the one hand and n-butane thiol on the other has been studied and the tritium isotope fractionation factors have been determined over the temperature range 250–320 K. Theoretical values of the equilibrium isotope effects in these reactions are found to be in good agreement with the experimental results. There exist considerable differences between the values of the fractionation factors for the systems studied showing that the isotope effect depends on the substituent on the amino group.