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The mass spectrometry of volatile derivatives—II: N‐alkyl trifluoracetamides
Author(s) -
Saxby M. J.
Publication year - 1969
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.1210020104
Subject(s) - alkyl , ion , chemistry , mass spectrometry , electron ionization , resolution (logic) , high resolution , mass spectrum , medicinal chemistry , derivative (finance) , analytical chemistry (journal) , chromatography , organic chemistry , ionization , economics , geology , remote sensing , artificial intelligence , computer science , financial economics
Under electron‐impact, N‐alkyl trifluoracetamides exhibit peaks due to [CF 3 ] + and [M CF 3 ] + . Ions corresponding to [COCF 3 ] + are absent. The base peak in many straight chain derivatives occurs at m/e 126 due to alkyl radical loss from the molecular ion; the mass of this ion rising to m/e 140 in the α‐substituted N‐sec‐butyltrifluoracetamide and to m/e 154 in the tert‐butyl derivative. High resolution measurements on a number of peaks indicate that they originate by loss of HF from other fragment ions.