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Mass spectrometry of derivatives of isomeric allenic fatty acids
Author(s) -
Christie W. W.,
Brechany E. Y.,
Lie Ken Jie M. S. F.,
Wong C. F.
Publication year - 1992
Publication title -
biological mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1052-9306
DOI - 10.1002/bms.1200210508
Subject(s) - allene , moiety , chemistry , mass spectrum , mass spectrometry , electron ionization , ion , molecule , stereochemistry , medicinal chemistry , hydrocarbon , organic chemistry , chromatography , catalysis , ionization
The electron impact mass spectra have been obtained for isomeric C 14 and C 18 allenic fatty acids in the form of the methyl and picolinyl ester derivatives. When the allene moiety was in positions 3 to 9, the mass spectra of the methyl esters gave spectra with diagnostic ions that appeared to be formed by beta cleavage on the distal side of the molecule; otherwise hydrocarbon ions were dominant. With the picolinyl ester derivatives, distinctive fragmentations beta to the allene moiety on each side were observed for each isomer.