## 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.
Measurement of Long-Range 1H-13C Coupling Constants Using Selective Excitation of Carbon-13
✍ Scribed by B. Adams; L. Lerner
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 377 KB
- Volume
- 103
- Category
- Article
- ISSN
- 1064-1858
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
In recent years, heteronuclear J cross-polarization experi-pled proton(s) via 1 H-1 H NOE when the source carbon is ments have been revitalized as a preferable alternative to protonated (13). Both selective one-dimensional and nonsetechniques based on pulse-interrupted free precession to lective mul
## Abstract One bond and long range ^13^C^1^H coupling constants for some methoxy‐, amino‐ and hydroxypyridines are described. An unambiguous assignment of carbon‐13 resonances is carried out based on the analysis of the fine splitting caused by long range couplings. __J__ values for compounds oth
## Abstract Chemical shifts and long‐range ^13^C, ^1^H coupling constants to the two carbonyl C atoms were determined for a series of ethyl 2‐acyloxy‐2‐alkenoates. The ^3^__J__(C,H) coupling constant across the double bond is 9.5–10.1 Hz for the __E__‐ and 2.9–3.8 Hz for the __Z__‐isomer. ^3^__J__(