## Abstract ^13^C chemical shifts and ^31^P,^13^C coupling constants are reported for nine 1‐hydroxyalkylphosphonic and two additional phosphonic acids. The α‐substituent‐induced chemical shifts (α‐SCS) of the phosphonate group were calculated and their non‐additivity was observed. Good linear corr
Effect of substituents on the 13C chemical shifts of the azomethine carbon atom of N-(substituted phenylmethylene)-3- and -4-aminobenzoic acids
✍ Scribed by B.Ž. Jovanović; A.D. Marinković; F.H. Assaleh; J. Csanádi
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 130 KB
- Volume
- 744-747
- Category
- Article
- ISSN
- 0022-2860
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## Abstract __N__,__N__‐diisopropylamides and ‐thioamides show hindered rotation around the NCH bonds, and the presence of mixtures of conformational isomers can be demonstrated at temperatures below 273 K in solution. ^1^H and ^13^C NMR spectra of these conformers are measured and assigned. The ^
## Abstract The ^13^C NMR chemical shifts for 4‐oxo‐1,3‐dioxolane (1) and its all methyl‐substituted derivatives (2–10) as well as for 5‐oxo‐1,3‐oxathiolane (11) and its nine alkyl‐substituted derivatives (12–20) are reported. The magnitude and variety of the substituent effects are in accordance w
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