13C NMR of pterocarpans
β Scribed by A.A. Chalmers; G.J.H. Rall; M.E. Oberholzer
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- French
- Weight
- 291 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4020
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π SIMILAR VOLUMES
## Abstract ^13^C NMR chemical shifts and ^13^Cο£Ώ^13^C couplings for six specifically labeled [^13^C] azobenzenes are reported. Coupling magnitudes depend on the position of labeling and the nature of the substituents.
## Abstract The ^13^C NMR chemical shifts of nine acetoxyxanthones are reported and identified. The acetoxy substituent effects have been evaluated and the corresponding shift increments proposed.
13C NMR chemical shifts were measured in for Γuorocarbonyl compounds. Sulfonic DMSO-d 6 derivatives display 4J(C,F) coupling constants for carbonyl groups which are also obtained from non-sulfonic derivatives when they are recorded in acidic solution.
The 13C N M R spectra of eight biologically interesting benzofuranimidazoles were measured and assigned on the basis of 13C-l H (short-and long-range) correlated spectra