13C-NMR as a tool for identification and enantiomeric differentiation of major terpenes exemplified by the essential oil of Lavandula stoechas L. ssp. stoechas
✍ Scribed by Dominique Ristorcelli; Félix Tomi; Joseph Casanova
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 119 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0882-5734
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✦ Synopsis
The essential oil of a wild plant from Corsica, Lavandula stoechas L. ssp. stoechas, was analysed by 13 C-NMR spectroscopy, without previous separation. The quanti®cation of the components was realized using GC. Fifty samples have been studied, from throughout Corsica. In all the samples, the sum of the fenchone and camphor contents is high (51±83%). However, their respective ratios vary greatly. Moreover, enantiomeric dierentiation of camphor and fenchone directly in the essential oil has been realized using 13 C-NMR spectroscopy and a chiral lanthanide shift reagent, tris[3-(hepta¯uoropropylhydroxymethylene)-D-camphorato]ytterbium(III) (Yb(hfc) 3 ). Both enantiomers of camphor are present in a sample studied, whereas only () fenchone is present in another sample.