## Abstract Carbon‐13 magnetic resonance spectra of the s‐__cis__ and s‐__trans__ rotamers of enamino ketones and thiones of the general formula \documentclass{article}\pagestyle{empty}\begin{document}${\rm X =}\mathop {\rm C}\limits^{\rm 1} {\rm (}\mathop {\rm R}\limits^{\rm 1} {\rm)}\mathop {\rm
Conformational studies by nuclear magnetic resonance—V:13C spectra and structural problems of enamino carbonyl compounds
✍ Scribed by Lech Kozerski; Janusz Dabrowski
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 401 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A ^13^C magnetic resonance investigation of 22 compounds of the general formula OC^1^(R^1^)C^2^(R^2^)C^3^(R^3^) NR^4^R^4′^ has been carried out in order to confirm the conformational assignments estimated previously by PMR and IR spectroscopy. The effects of nonplanarity and hindered rotation have been discussed based on chemical shifts and shapes of the C^1^, C^2^ and C^3^ signals.
📜 SIMILAR VOLUMES
The s-cis + s-trans equilibrium of several enamino ketones and aldehydes, has been evaluated based on the results of aromatic solvent induced shift measurements and of protonation of the title compounds. In contrast to cc,p-unsaturated ketones bearing no heteroatom, the A&,,,, value but not the A.83
## Abstract ^1^H‐ and ^13^C‐nmr studies of conformational transitions of random amino acid copolymers containing aromatic residues (Lys^50^Tyr^50^)~__n__~ and (Lys^50^Phe^50^)~__n__~ in the presence of neutral salts were performed to serve as models of the aggregation behavior of polypeptides of bi