Gas-Phase Reaction Rates of Some Positive Ions with Water at 296°K

Abstract

Measurements of the rate constants for the reactions of He+, Ne+, Ar+, Kr+, O+, N+, and N2- with H2O by the flowing afterglow technique at 296°K gave values of 0.56, 0.74, 1.43, 1.19, 2.33, 2.57, and 2.19×l 10-8 cm3/sec with standard deviation of 7%-15%. They are in good agreement with extrapolated beam results for Ar+, O +, N+, and N2+. Close agreement is also found for all but He+ and Ne+ with estimates based on classical trajectory calculations for similar ion plus dipole systems.