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Ion‐molecule reactions observed for nitroaromatic compounds in negative ion fast atom bombardment mass spectrometry
Author(s) -
Balasanmugam Kesagapillai,
Miller Jack M.,
Smith Richard W.
Publication year - 1988
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210231002
Subject(s) - ion , fast atom bombardment , chemistry , mass spectrometry , mass spectrum , molecule , dissociation (chemistry) , electron ionization , collision induced dissociation , ionization , analytical chemistry (journal) , spectral line , polyatomic ion , tandem mass spectrometry , chromatography , organic chemistry , physics , astronomy
Analyses of a series of nitroaromatic compounds using fast atom bombardment (FAB) mass spectrometry are discussed. An interesting ion‐molecule reaction leading to [M + O − H] − ions is observed in the negative ion FAB spectra. Evidence from linked‐scan and collision‐induced dissociation spectra proved that [M + O − H] − ions are produced by the following reaction: M + NO 2 − → [M + NO 2 ] − → [M + O − H] − . These experiments also showed that M −˙ ions are produced in part by the exchange of an electron between M and NO 2 − species. All samples showed M −˙ , [M − H] − or both ions in their negative ion FAB spectra. Not all analytes studied showed either [M + H] + and/or M + ˙ in the positive ion FAB spectra. No M + ˙ ions were observed for ions having ionization energies above ∼9 eV.