Inverse kinetic isotope effects in the charge transfer reactions of ammonia with rare gas ions.

ABSTRACT: In the absence of experimental data, models of complex chemical environments rely on predicted reaction properties. Astrochemistry models, for example, typically adopt variants of capture theory to estimate the reactivity of ionic species present in interstellar environments. In this work, we examine astrochemically-relevant charge transfer reactions between two isotopologues of ammonia, NH₃ and ND₃, and two rare gas ions, Kr⁺ and Ar⁺. An inverse kinetic isotope effect is observed; ND₃ reacts faster than NH₃. Combining these results with findings from an earlier study on Xe⁺ (Petralia et al., Nat. Commun., 2020, 11, 1), we note that the magnitude of the kinetic isotope effect shows a dependence on th

SUBMITTER: Tsikritea A 

PROVIDER: S-EPMC8317658 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature