Muonium atoms compared to hydrogen atoms and hydrated electrons through reactions with nitrous oxide and 2-propanol

N2O and 2-propanol constitute a pair of solutes with completely opposite relative reactivities towards H and e-?sub(aq). It is observed in the present study that muonium atoms (Mu) fall directly between H and e-sub(aq) for both of these reactions. Aspects of mass-dependent processes and kinetic isotope effects are discussed with regard to these findings. (author)