## Abstract Carbon‐13, proton coupling constants have been measured in eighteen different 2‐substituted propanes. ^1^__J__(C‐2,H) shows variations similar to those observed previously for monosubstituted methanes. ^2^__J__(C‐2,H) is essentially independent of the substituent at C‐2, while ^2^__J__(
Carbon-13, 1H spin–spin coupling VI—biphenylene
✍ Scribed by Jan Runsink; Harald Günther
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 283 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
^13^C, ^1^H coupling constants for biphenylene have been obtained from the analysis of the ^13^C NMR spectrum of the natural abundance α‐^13^C‐ and β‐^13^C‐isotopomers. The various mechanisms responsible for the observed results are discussed.
📜 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 We report the determination of two‐ and three‐bond ^1^H‐^15^N spin–spin couplings in the nmr spectra of a polypeptide. The ^1^H‐ and ^15^N‐nmr spectra of 99.2% ^15^N‐enriched alumichrome have been studied at 360 MHz and 10.1 MHz, repectively. While some ^2^__J__ and ^3^__J__ coupling ar
## Abstract A summary of all the one‐bond carbon–carbon spin–spin coupling constants, Known up to the beginning of 1980, is given in diagrammatic form.
## Abstract The signs of the spin–spin coupling constants between the aldehydic proton and the fluorine nuclei in pentafluorobenzaldehyde are negative over four and six formal bonds and positive over five bonds. The opposite signs had been assumed in previous studies of this molecule. The correct s