17O nuclear magnetic resonance:mutual effect between two β oxygen atoms and α,β double bond effect on 17O chemical shift
✍ Scribed by Jean-Pirre Kintzinger; Claude Delseth; T.Thanh-tâm nguyên
- Book ID
- 107857135
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- French
- Weight
- 603 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0040-4020
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Methyl b-substituent e †ects on 17O chemical shifts in dicoordinated oxygen atoms in compounds of the type are found to be insensitive to the nature of the X substrate, even for strongly conjugating CH 3 ÈOÈX groups. Such behavior is rationalized in terms of intramolecular electron delocalizing usin
The intramolecular H-bond strength in cis-enolic forms of b-diketones was investigated. The correlations between the 'H hydroxyl proton shieldings and the chemical shifts of the "C and "0 nuclei involved in the chelate ring, and the H/D isotope shifts on the latter resonances, were determined. An in