| Abstract: | The negative-ion mass spectra of azobenezene and its derivatives were obtained using the resonance electron-capture technique. The molecular negative ion peaks (M?·) were found to be dominant for almost all of these compounds. Different mechanisms of formation of molecular ions in two energy regions are proposed and the pathways of fragmentation are discussed. It is shown that fragment ions are formed predominantly by direct bond breaking except for those which derive from long-lived resonance states of M?·. |
