Mass spectra of the picolinyl ester derivatives of some isomeric dimethylene-interrupted octadecadiynoic acids

Add time:09/27/2019    Source:sciencedirect.com

Picolinyl ester derivatives have proved to be of great value for the mass spectrometric location of double bonds in fatty acids. Their utility for the identification of triple bonds in a series of dimethylene-interrupted octadecadiynoic acids has now been investigated. In the electron-impact mass spectrum of each isomer, there were always a prominent molecular ion and ions characteristic of the pyridine ring. In general, the triple bond more remote from carbonyl group was identifiable because of the presence of diagnostic ions, but the proximal triple bond was not.

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