The 17O NMR spectra of a number of alkyl-and phenyl-substituted divinyl ethers were recorded in CDCl 3 solution. The relationship between chemical shift and the number, nature and position of substituents was explored. The shift values, falling in the range d 100-140 ppm, were found to be remarkably
17O NMR Spectra of 1-adamantylphosphoryl derivatives
β Scribed by Helmut Duddeck; Atef G. Hanna
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 318 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
β¦ Synopsis
The "0 chemical shifts and one-bond phosphorus-oxygen coupling constants of a series of 1-adamantylphosphoryl derivatives are reported and discussed. It was found that a signi6cant 2p electron transfer towards the phosphoryl oxygen in the phosphonic esters is clearly reflected by the "0 NMR parameters.
π SIMILAR VOLUMES
Intercarbonyl dihedral angles have been estimated by molecular mechanics, which show invariance except in one case. Because of this invariance, contrary to other a-dicarbonyl compounds, a correlation between chemical shifts and dihedral intercarbonyl angles could not be developed. Spectroscopic and
## Abstract The ^17^O NMR spectra of 58 Ξ±,Ξ²βunsaturated (vinyl) ethers were recorded in CDCl~3~ solution. The dependence of the chemical shift on the number and position of alkyl substituents in the vinyl moiety and on the nature and bulkiness of the alkoxy group was explored. The oxygen chemical s
## Abstract ^17^O NMR data for 52 phenoxyethyl derivation have been measured and assigned. Copyright Β© 2003 John Wiley & Sons, Ltd.
The 17O, 13C and 1H NMR spectra of a number of 1,2-dialkoxyethenes R1OCHxCHOR2 were recorded. The O atoms, in particular those of the E forms, are strongly shielded relative to the 17O nuclei of the corresponding alkyl vinyl ethers Moreover, in compounds of the type ROCHxCHOMe, the di β er-ROCHxCH 2