13C,13C coupling constants from a mixture of isotopomers (13C) of substituted aromatic compounds; 1-nitronaphthalenes
โ Scribed by Poul Erik Hansen; Jean-Pierre Albrand
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 198 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
^13^C Homonuclear decoupling experiments led to the assignment of the carbonโcarbon coupling constants of ^13^Cโenriched 1โnitronaphthalene obtained by nitration of [1โ^13^C]naphthalene. The effects of substituents on coupling constants can be explained on the basis of the electronegativity of the first atom of the substituent, and the observed substituent effects are shown to be parallel to previous data for oxygen containing substituents.
๐ SIMILAR VOLUMES
## Abstract Coupling constants, ^1^__J__(^13^C,^13^C), of compounds containing a CF~3~ group are reported. The values for the coupling of the CF~3~ carbon with the neighbouring carbon are exceptionally large. In a series of compounds in which the CF~3~ group is bonded to an sp^3^, sp^2^ or sp carbo