Enantiomers and chira which differ clearly in their i3relaxation reagents (CRR) afford diastereomeric complexes, C spin-lattice relaxation times. Chiral lanthanide complexes and enantiomers are well known to form diastereomeric complexes
Chiral relaxation reagents (crr) in 13C NMR spectroscopy: First determination of enantiomeric excess
β Scribed by Edgar Hofer; Regina Keuper
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- French
- Weight
- 128 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0040-4039
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Oxazolidine derivatives of p-amino alcohols such as ephedrine have been resolved by -C NMR spedroscopy using Eu(hfc), as a chiral shift reagent. The method is quantitative in the determination of enantiomeric excess, and is advantageous where 'H NMR is of limited use owing, for example, to signitica
The 13C NMR behaviour of ten acyclic terpene alcohols was examined in the presence of a chiral lanthanide shift reagent (CLSR). For each alcohol, we measured the lanthanide-induced shift (LIS) on the signals of the carbons and the splitting of some signals, which allowed the enantiomeric differentia