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Electron impact mass spectra of the oxazoline derivatives of some conjugated diene and triene C 18 fatty acids
Author(s) -
Spitzer V.,
Marx F.,
Pfeilsticker K.
Publication year - 1994
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540465
Subject(s) - isomerization , chemistry , conjugated system , double bond , oxazoline , allylic rearrangement , mass spectrum , diene , mass spectrometry , electron ionization , medicinal chemistry , bond cleavage , conjugated diene , photochemistry , stereochemistry , organic chemistry , chromatography , catalysis , natural rubber , monomer , polymer , ion , ionization
The location of the double‐bond systems of some conjugated diene and triene C 18 fatty acids (C18∶2[9,11], C18∶2[10,12], C18∶3[9,11,13] and C18∶3[10,12,14]) derived from alkaline isomerization has been determined by gas chromatography/mass spectroscopy analysis of their 4,4‐dimethyloxazoline derivatives. The positions of the double bonds were indicated by a characteristic mass separation of 12 atomic mass units for each olefinic bond. Furthermore, the structure assignments were supported by the presence of prominent formal allylic cleavage peaks.