## Abstract The addition of Co^2+^ to D~2~O solutions of Nicotinamide Adenine Dinucleotide induces modifications of the ^13^C n.m.r. signal line widths of these coenzymes. Analysis of the observed paramagnetic effects shows that both states (reduced and oxidized) and both conformations (folded or u
Carbon-13 nuclear magnetic resonance of the azomethine group. II—(II.II) conjugation and twist angles
✍ Scribed by A. Solladié-Cavallo; G. Solladié
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 267 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
Torsional angles in some mono‐substituted conjugated benzenes were determined from the chemical shift of the para carbons. Similar results were obtained from ketones and imines, and the torsional angles increase, as expected, with steric hindrance. It is possible to assign a syn or anti stereochemistry for the imines from the value of the torsional angle.
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## Abstract Carbon‐13 NMR chemical shifts and ^1^__J__(CH), ^2^__J__(CH) and ^3^__J__(CH) coupling constants of selected saturated nitrogen heterocyclic molecules containing the acetylenic moiety have been determined. These NMR parameters have also been determined for the corresponding __N__‐oxides
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