## Abstract The signs of all ^13^C^19^F and ^1^H–^19^F coupling constants in fluorobenzene, some substituted derivatives, and in 2‐fluoropyridine have been related using single‐frequency ^13^C{^1^H} double resonance techniques. All ^13^C^19^F couplings in these compounds are shown to be positive
13C1H Coupling Constants in Fluoropyridines
✍ Scribed by A. Yu. Denisov; V. I. Mamatyuk; O. P. Shkurko
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 211 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
The proton-coupled 13C NMR spectra of 2-, 3-and 4-fluoropyridines were completely analysed and the signs and magnitudes of the 13C-1H coupling constants determined. The root mean square deviations of the observed J(CH) values from those calculated using empirical correlations between the coupling constants in monosubstituted pyridines and benzenes were found to be 0.90 Hz for 'J(CH) and less than 0.26 Hz for the other "J(CH) couplings.
📜 SIMILAR VOLUMES
## Abstract ^13^C, ^1^H spin coupling constants of dimethylacetylene have been determined by the complete analysis of the proton coupled ^13^C NMR spectrum. For the methyl carbon ^1^__J__(CH) = + 130.6~4~ Hz and ^4^__J__(CH) = + 1.5~8~ Hz, and for the acetylenic carbon ^2^__J__(CH) = − 10.34 Hz and
## Abstract Proton coupled carbon‐13 NMR spectra of eleven mono‐, di‐ and trimethylpyridines were analysed on a first order basis. The long range ^13^C^1^H coupling constants are similar to those observed for pyridine and cyanopyridines.