Carbon-13 NMR spectra of dispiro compounds: Effect of homologation on chemical shifts of spiro carbons
โ Scribed by Neelima M. Seth; A. P. Bhaduri
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 238 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0749-1581
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๐ SIMILAR VOLUMES
The 13C NMR chemical shifts of nitriles and nitro compounds derived from nineteen aliphatic and seven aromatic systems have been recorded and assigned. The shifts are compared with those of the hydrocarbons to give the substituent effects of the CN and NO2 groups.
## Abstract The carbonโ13 n.m.r. spectra of several oxaziridines were measured. Aliphatic and aromatic __ipso__ carbon atoms __trans__ to the lone pair of nitrogen in oxaziridines were shifted upfield by __c.__ 9 ppm, and 3.4 ppm, respectively, in comparison with isomers of inverted configuration.
## Abstract ^13^C NMR of diastereoisomeric pairs of 2,3โdiarylโ2โmethylbutyronitriles revealed a difference in the chemical shift of the carbon atoms between the diastereoisomers and the observed shifts were greatly influenced by the presence of an __ortho__ substituent in the 3โphenyl ring.
The 13C NMR spectra of a series of compounds of the type R1P(NR2),Phs,, Xare reported. A net trend toward larger 'J(PC) values with an increasing number of diakylamino substituents is observed.