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Ion-molecule reactions observed for nitroaromatic compounds in negative ion fast atom bombardment mass spectrometry

✍ Scribed by Kesagapillai Balasanmugam; Jack M. Miller; Richard W. Smith

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 537 KB
Volume: 23
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210231002

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✦ Synopsis

Analyses of a series of nitroaromatic compounds using fast atom bombardment (FAB) mass spectrometry are discussed. An interesting ion-molecule reaction leading to [M + 0mions is observed in the negative ion FAB spectra. Evidence from linked-scan and collision-induced dissociation spectra proved that [M + 0 -HI-ions are produced by the following reaction: M + NO,-+ + NO,]-+ [M + 0 -w-. These experiments also showed that M-' ions are produced in part by the exchange of an electron between M and NO,-species. All samples showed M-', [M -HIor both ions in their negative ion FAB spectra. Not all analytes studied showed either [M + HI+ and/or M+' in the positive ion FAB spectra. No M+' ions were observed for ions having ionization energies above -9 eV.

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