✦ LIBER ✦
Use of 13C isotope shifts to assign carbon atoms α and β (and para) to a hydroxy group in alkyl substituted phenols and alcohols
✍ Scribed by Richard A. Newmark; James R. Hill
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 422 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Doublets can be observed for carbons α and β to the hydroxyl in aliphatic alcohols containing equimolar amounts of OH and OD dissolved in (CH~3~)~2~SO containing CaSO~4~ desiccant. Isotopic doublets are also observed for the ipso and ortho carbons in alkyl substituted phenols. Para isotopic doublets are observable in para‐substituted phenols containing a large 2‐substituent. The isotope shift is positive (low field) for the para carbon, opposite to the negative shifts usually observed.