## 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
15N and17O NMR spectra of vinyl ethers of pyridine and quinoline
β Scribed by A. V. Afonin; V. K. Voronov; E. I. Enikeeva; M. A. Andrayankov
- Book ID
- 112449400
- Publisher
- Springer
- Year
- 1987
- Tongue
- English
- Weight
- 362 KB
- Volume
- 36
- Category
- Article
- ISSN
- 1573-9171
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π SIMILAR VOLUMES
The "0 NMR spectra of a number of heterocyclic vinyl ethers were recorded in CDCI, and DMSO-d, solutions. The oxygen chemical shifts reveal substantial differences in the strength of p-n conjugation between the five-and six-membered ring compounds, especially between those with an exocyclic C=C bond
Carbon, nitrogen and oxygen NMR spectra of some nitro derivatives of pyrrole and imidazole have been investigated. The 13C chemical shifts of para-carbons and the 170 chemical shifts of the nitro group correlate qualitatively with the electron densities on these carbon and oxygen atoms, which in tur
## Abstract The 5βmethyl(^15^N~2~)[__O__^2^,__O__^4^β^17^O~2~]uridine (= (^15^N~2~)[__O__^2^,__O__^4^β^17^O ~2~]ribosylthymine; 15) was synthesized and analyzed by ^15^Nβ and ^17^OβNMR spectroscopy. (^15^N~2~)Urea was condensed with 2,3βdibromoβ2βmethylpropanoyl chloride (3) and cyclized to form (^