## Abstract The torsion angle effect on the isotropic shielding of ^17^O nucleus in α,β‐unsaturated carbonyl groups is studied by means of density functional theory (DFT) calculations using a polarizable continuum model (PCM) for the solvent, employing the PBE0 functional together with the 6‐311G(d
Solvent shifts in the NMR spectra of α-halo-β-methoxy-carbonyl compounds : Assignment of the α- and β-proton magnetic resonances
✍ Scribed by M.C. Cabaleiro; N.N. Giagante; M.A. León
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- French
- Weight
- 266 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4020
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A new 13C N M R method based on solvent effects allows the identification of carbon atoms a to a carbonyl group. With a simple change in solvent from CDCl, to CDC1,-dioxane (1:4), the -C absorption for all carbons except those a to the carbonyl group in the compounds under study were displaced to lo
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