On the Competitive Hydrogen Transfer Channels for Various N-Acyllactam Systems during Metastable Time Window in Gas Phase Ion Chemistry. An Approach Using Four Sector Tandem Mass Spectrometer

Abstract

A variety of approaches on mass spectrometry/mass spectrometry in gas phase unimolecular dissociation have been focused in metastable timeframe under various field free regions using double reversed geometry four sector tandem mass spectrometer. In the case of high resolution mass selection followed by high resolution product ion scan in third field free region it was found that single/double hydrogen transfer occurs from acyl group into lactam moiety in not only the molecular ion of 5-phenylvaleryl but also that of 6-phenylhexanoyllactams. Intervention of ion-neutral complex should be proposed as the fragmentation scheme.