Electron†impact†induced hydrogen migration in organic molecules. II—novel hydrogen migration in dihydro†2†stilbazole derivatives

The mass spectra of 2′‐OH, 2′‐NH2 and 2′‐CH3‐dihydro‐2‐stilbazole derivatives show an interesting hydrogen migration. The hydrogen migration is shown to be taking place from the above mentioned substituents to the nitrogen of the pyridine ring followed by a β‐cleavage giving rise to a common ion e at m/e 93, perhaps through an 8‐membered transition state. Copyright © 1975 Heyden & Son Ltd.