Rotation barriers in N-substituted 2,4,6-trimethylpyridinium cations
✍ Scribed by A.T. Balaban; Cornelia Uncuţa; A. Dinculescu; M. Elian; F. Chiraleu
- Book ID
- 108382028
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- French
- Weight
- 290 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0040-4039
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In the n.m.r. spectrum of the sulphenamide cl),1 two doublets are observed for group at 6 0.93 and 1.48 (CFC13). Repeated crystallisation from light petroleum gave the methyl one diastereoisomer containing only the doublet at 6 0.93; the other diastereoisomer containing only the doublet at 6 1.48,wa
## 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‐wi