Product distributions for the ion–molecule reactions N++O2 and N3++O2

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Abstract
The title reactions were studied using a drift tube–mass spectrometer apparatus featuring preselection of injected primary ions. Measurements of the reduced mobilities of N+ and N3+ indicate experimental conditions such that the energies of the reacting ions are close to thermal (300 K). Rate coefficients obtained for the title reactions are k3=7.5×10−10 cm3 sec−1 for the reaction N++O2 and k6=7.7×10−11 cm3/sec−1 for the reaction N3++O2, in good agreement with literature values. Several other rate coefficients for reactions of N+, N2+, and N4+ ions are also in agreement with previous data. Altogether seven reactions had to be taken into account to derive the product distributions for the title reactions. The resulting product yields are 0.45, 0.41, 0.09 for the products O2+, NO+, and O+, respectively, from the N++O2 reaction; and 0.49, 0.65 for the products NO+ and NO2+, respectively, from the N3++O2 reactions.