Studies in organic mass spectrometry. Part 24† Electron ionization mass spectra of some aryl(2-nitrobenzo[b]thiophen-3-yl)amines

Abstract

The main fragmentation routes of eighteen title compounds and of three 5-chloro derivatives have been investigated with the aid of linked scan (B/E = constant) spectrometry, accurate mass measurements and deuterium labelling. Copyright 1999 John Wiley & Sons, Ltd.

Mass Spectrometry and Gas‐Phase Chemistry of Anilines

“…The formation of significant amounts of such fragments has also recently been observed for anilines bearing a strong electron-withdrawing or electron-donating substituent in the para position 64 . Their formation has been demonstrated to result from oxygen migration from the ortho nitro group to the aniline ring, as Scheme 30 illustrates for one such aniline derivative.…”

Characterization of Isomeric 1,2,4-Oxadiazolyl-N-Methylpyridinium Salts by Electrospray Ionization Tandem Mass Spectrometry

“…2,3 Ionic liquids containing N,N′′-dialkylimidazolium, [4][5][6][7] Nalkylpyridinium, 8,9 N-alkyl-N′-polyfluoroalkyl-imidazolium, 8,9 N(4)-polyfluoroalkyl-1,2,4-triazolium 10,11 and C(3)perfluoroalkyl-1,2,4-triazolium as organic cations 12 have been reported. In the framework of our ongoing studies on synthesis and reactivity [13][14][15][16][17][18][19][20] as well as on mass spectrometry [21][22][23][24][25][26] of heterocyclic compounds, we became interested in the synthesis and characterization of organic salts containing an azole ring as a spacer between an azinium cation and an alkyl chain. The possibility to specifically tune different parameters such as the heterocycle, the length of the chain and its position in the heterocyclic ring may allow the modification of physical and chemical properties of these compounds.…”