Ionisation Energies and the Electronic Structures of the N‐oxides of diazabenzenes

The ionisation energies and the HeI photoelectron spectra of the N‐oxides of diazabenzenes are presented. The valence electronic structures of the N‐oxides are discussed in view of the ionisation energies, and the profiles, of the bands. The interpreted data are compared to calculations which are in good agreement. The results are correlated to the physicochemical studies, and particularly to the electronic absorption spectroscopy, of the N‐oxides. The assignment of the photoelectron spectra of the azabenzenes are considered with reference to the spectra of their N‐oxides.