✦ LIBER ✦
Electron ionization mass spectrometric determination of double bond position in monounsaturated α,β- and β,γ-isomeric isoprenoid acids
✍ Scribed by J.-F. Rontani
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 173 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0951-4198
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✦ Synopsis
Various derivatization methods have been tested for their usefulness in determining the position of double bonds in a,band b,g-unsaturated isoprenoid acids by gas chromatography/electron ionization mass spectrometry. Stereospecific oxidation with osmium tetroxide followed by trimethylsilylation gave positive results, while the use of dimethyl disulphide, epoxide and pyrrolidide derivatives must be discarded. Configurations of the double bonds of a,b-unsaturated isoprenoid acids could be easily determined from electron ionization mass spectra of their methyl and trimethylsilyl esters.