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Mass spectrometry: XI—Electron impact induced fragmentation of some amides of F‐acids and their deuterated homologues
Author(s) -
Greiner Jacques,
Pastor Raphael,
Cambon Aimé
Publication year - 1980
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.1210151205
Subject(s) - chemistry , electron ionization , deuterium , fragmentation (computing) , mass spectrum , mass spectrometry , alkyl , medicinal chemistry , stereochemistry , organic chemistry , chromatography , ion , physics , quantum mechanics , computer science , ionization , operating system
Abstract The mass spectrometry of perfluoro compounds (F‐alkyl compounds) has seldom been the subject of systematic studies. Fluorocarbons excepted, only a few mass spectra of such compounds have been analysed and corresponding fragmentations correlated. In this paper we report the mass spectra of 19 amides of perfluoro acids (R F CONHR) with R=benzyl, 2‐phenylethyl, 2‐phenylpropyl, 3‐phenylpropyl, 2‐( N ‐phenylamino)ethyl, and R F =F‐methyl, n ‐perfluoropropyl, n ‐perfluoropentyl and n ‐perfluoroheptyl. These compounds exhibit quite different behaviour from their hydrocarbon homologues under electron impact (for instance no [R F CO] + fragment was found). Specific deuterium labelling and high resolution measurements have been used to show typical rearrangements and to establish the fragmentation routes.