Long-range coupling constants, "J(C, H), involving the formyl proton or carbon and the carbons or protons of the heterocyclic ring, were measured in the two isomeric formyl-furans and -thiophenes by employing coupled 13C NMR spectra. In furan-2-carboxaldehyde these coupling constants, obtained in so
13C−H spin-spin coupling constants in thiophene
✍ Scribed by V. A. Cherkov; Yu. K. Grishin
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 1978
- Tongue
- English
- Weight
- 162 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0022-4766
No coin nor oath required. For personal study only.
📜 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 A series of 7‐^13^C‐labeled __o__‐substituted toluene derivatives and carboxyl‐^13^C‐isocrotonic and crotonic acid were synthesized and studied by ^13^C NMR spectroscopy to obtain ^13^C^13^C spin‐spin coupling constants involving the labeled carbon. The __cis__ ^3^__J__(CC) values were