## Abstract Deuterium isotope effects on the ^13^C and ^15^N nuclear shieldings of __o__βhydroxyazo compounds are described. Both the direct and the equilibrium contributions were determined. Large direct deuterium isotope effects on ^15^N nuclear shieldings for ^1^Ξ, ^2^Ξ and ^4^Ξ and negative Ξ^1
Deuterium isotope effect on 1J(15N,13C) in hydrogen cyanide
β Scribed by Kenneth J Friesen; Roderick E Wasylishen
- Publisher
- Elsevier Science
- Year
- 1980
- Weight
- 169 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0022-2364
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In this and subsequent papers the deuterium isotope effect is defined as h(D,H)=S(D)-h(H) following the convention used in referencing chemical shifts [ 101.
## Abstract A series of intramolecularly hydrogenβbonded enamines, enols and enethiols with ester carbonylic, ketonic carbonylic, thioester carbonylic, nitro and sulphoxide acceptors were investigated to obtain ^13^C chemical shifts and deuterium isotope effects. Results from 33 new compounds and s
Over 100 isotope effects on "C chemical shifts were determined in a series of deuteriated cis-stilbene isotopomers. The magnitude and sign of these effects depend on the position and the number of deuterium atoms in the molecule. The variations in two-and three-bond effects were rationalized by ste