Ionization and Dissociation of NO2 and N2O by Electron Impact

Abstract

A comparison of values of the ionization potential of NO₂ derived from direct electron impact, from dissociative ionization of CH₃NO₂, and from the ultraviolet spectrum of NO₂, show large discrepancies. There is reason to believe that three different electronic states are involved. The ionization potential of N₂O as measured by electron impact is in good agreement with spectroscopic data. The appearance potential of O⁺ ion from N₂O gives D(NN–O)=39.7 kcal/M, in excellent agreement with the thermochemical value of 39.49 kcal/M.