## Abstract The OH chemical shift of the enol form of nitromalonamide is found at 18.9 ppm both in DMSO‐__d__~6~ and in DMF‐__d__~7~ indicating a very strong hydrogen bond. The OH chemical shift is insensitive to temperature changes. Contrary to the large OH chemical shift, a small two‐bond deuteri
Deuterium isotope effects on 13C chemical shifts in amino acids and dipeptides
✍ Scribed by H Kenneth Ladner; Jens J Led; David M Grant
- Publisher
- Elsevier Science
- Year
- 1975
- Weight
- 287 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-2364
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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
Exchange of amide protons with deuterium results in changes of 13 C chemical shifts for carbon atoms near the site of substitution (CH{N and N{C|O). There is a measurable decrease in the isotopic shifts of CH{N for cycloalkylacetamides as ring size increases from 3 to 8 and for lactams as ring size
## Abstract Deuterium isotope effects on ^13^C chemical shift of tetrabutylammonium salts of Schiff bases, derivatives of amino acids (glycine, L‐alanine, L‐phenylalanine, L‐valine, L‐leucine, L‐isoleucine and L‐methionine) and various ortho‐hydroxyaldehydes in CDCl~3~ have been measured. The resul