Zum massenspektrometrischen Verhalten von Diarylaminen

The fragmentation behaviour of diarylamines in a mass spectrometer can be interpreted most plausib by assuming carbazole cyclization reactions. As a first step the loss of a hydrogen atom is presumed, followed by another hydrogen loss resulting in the formation of the carbazale structure. Investigations of 10 diarylamines show that the probability of cyclization depends on the size of the π-electron system.