## Abstract Hindered rotation in two __o__‐substituted __N__,__N__‐dimethylthiobenzamides was investigated by variable temperature ^1^H NMR spectroscopy. For one compound, the enthalpies and entropies of activation for (i) thioamide group rotation around the ArC bond and (ii) dimethylamino group r
Barriers to rotation of the dimethylamino group in some 2-amino-4-(N,N-dimethylamino)pyrimidines
✍ Scribed by C. H. J. Wells
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 171 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The free energy of activation for rotation about the exocyclic CN bond of the dimethylamino group of some 6‐substituted 2‐amino‐4‐(N,N‐dimethylamino)pyrmidines has been determined using ^1^H NMR line shape analysis. The results are discussed in terms of the relative electron‐withdrawing and electron‐releasing effects of the substituents.
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