KINETIC ISOTOPIC EFFECTS IN THE REACTION OF URANIUM DISPROPORTIONATION (V) IN H2O AND D2O

The research works were aimed at determining the kinetic isotropic eff ects in the U(V) disproportionation reaction in H2O and D2O, in order to clarify this reaction mechanism. By polarographic determinations in usual and heavy water the rate constants for various temperatures and energy values were calculated. The resulting reverse kinetic isotopic effect shows that the U(V) disproportionation process is about 2.5 ti mes more rapid in D2O than in H2O, showing also the existence of a rap id protonation, deuteration respectively, preequilibrium, in parallel with the load-transfer reaction.