The 13C NMR spectra of 48 chlorinated biphenyls are presented. The I3C shifts of the individual carbons are interpreted by the additive contributions from the substituent effect of a chlorine atom, and by the repulsive interaction of chlorine atoms substituted in a crowded relationship on the biphen
13C n.m.r. chemical shifts of carbodiimides
β Scribed by Frank A. L. Anet; Issa Yavari
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- English
- Weight
- 220 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
The ^13^C n.m.r. chemical shifts of the spβhybridized carbons in dialkylcarbodiimides have values of Ξ΄c β 140. These shifts are compared with those of similarly hybridized carbons occuring in other classes of compounds.
π SIMILAR VOLUMES
## Abstract ^13^C chemical shifts are reported for adamantane, nine 1βsubstituted adamantanes and nine 2βsubstituted adamantanes. The substituents are F, Cl, Br, I, NH~2~, OH, CH^2^, CN and CO~2~H. The assignments and results are discussed in terms of chemical shift patterns.
Isotropic 13C chemical shifts of the ribose sugar in model RNA nucleosides are calculated using SCF and DFT-GIAO ab initio methods for different combinations of ribose sugar pucker, exocyclic torsion angle, and glycosidic torsion angle. Idealized conformations were obtained using structures that wer
## Abstract Carbonβ13 n.m.r. spectra of formic, acetic, propionic and butyric acid amides with __N__,__N__βdiβ__n__βalkyl substituents have been completely assigned with the aid of extensive double resonance experiments. The data obtained were used to study long range steric effects on chemical and
## Abstract ^13^C n.m.r. chemical shifts and one bond ^13^C, ^1^H coupling constants for cyclopropene and its 1β and 3βmethyl derivatives as well as for methyl cyclopropane have been measured. The data for cyclopropene are 108Β·9 ppm and 228Β·2 Hz, 2Β·3 ppm and 167Β·0 Hz in the olefinic and allylic pos
## Reference Data 13C NMR Chemical Shifts of N u nsubstituted-and N-MethyI-Pyramle Derivatives 13C shielding data for 100 derivatives of pyrazole are reported. These include methyl, ethyl, n-propyl, tert-butyl, phenyl, hydroxymethyl, carboxyl, ethoxycarbonyl, cyano. amino, hydrazino, nitro, azido,