Deuterium isotope effects on I3C nuclear shielding, "AC(OD), were investigated for a series of enolic /3-diketones at different temperatures. The investigated enolic B-diketones cover a broad range of tautomeric equilibrium constants (K). The equilibrium constants were estimated from ''0 and I3C che
Deuterium Isotope Effects as a Probe for CC Hyperconjugation
✍ Scribed by Berger, Stefan ;Diehl, Bernd W. K. ;Künzer, Hermann
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1987
- Tongue
- English
- Weight
- 431 KB
- Volume
- 120
- Category
- Article
- ISSN
- 0009-2940
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📜 SIMILAR VOLUMES
Cyclic ketones from cyclobutanone to cyclohexadecanone were labelled with deuterium in the a-position. The deuterium isotope effect on the ''C NMR spectra was measured and in some cases was indicative of perturbation of conformational equilibrium. Similar effects were observed with acyclic ketones.
## Abstract Large deuterium isotope effects of both signs have been observed on the ^13^C nuclear shielding in proton‐chelating tautomeric forms of β‐thioxoketones, and small isotope effects of both signs have been found in related forms of Schiff's bases of salicylaldehydes. These effects are inte
## Abstract Deuterium‐induced isotope effects on ^13^C chemical shifts and ^1^__J__(^13^C‐α, ^1^H) coupling constants in benzaldehyde were measured. Over 30 different effects on ^13^C chemical shifts were revealed. The effects through one (^1^Δ) and two bonds (^2^Δ) have mean values of 282.1 ± 9.6