## Abstract High field high resolution ^13^C NMR spectroscopy allows the quantitative determination of a mixture of the four diastereomers in racemic Ξ±βtocopherol.
Enantiomeric purity determination by NMR: proving the purity of a single enantiomer
β Scribed by Lewis, Richard J.; Bernstein, Michael A.; Chang, Hui-Fang; Chapman, David; Pemberton, Nils
- Book ID
- 120545565
- Publisher
- Elsevier Science
- Year
- 2013
- Tongue
- English
- Weight
- 723 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0957-4166
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Absolute configuration and enantiomeric purities of some hydroxyketones and diols of spiro[4\_4]nonane and 2,2'-spirobi-indan can be simultaneously determined by use of MTPA derivatives and a lanthanoid shift reagent.
## Abstract The enantiomeric purities of disubstituted Ξ²βlactams were determined by ^1^H and ^13^C NMR spectroscopy using tris[3β(trifluoromethylhydroxymethylene)βdβcamphorato]europium(III), Eu(tfc)~3~, as a chiral shift reagent. Using a [Eu(tfc)~3~]/[lactam] ratio of 0.5, most of the resonances we