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Résonance Magnétique Nucléaire de 17O. Aldéhydes et cétones aliphatiques: additivité des effets de substitution et corrélation avec la 13C-RMN

✍ Scribed by Claude Delseth; Jean-Pierre Kintzinger


Publisher
John Wiley and Sons
Year
1976
Tongue
German
Weight
595 KB
Volume
59
Category
Article
ISSN
0018-019X

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✦ Synopsis


^17^O‐NMR. Aliphatic aldehydes and ketones, additivity of substituent effects and correlation with ^13^C‐NMR.

The ^17^O‐chemical shifts of 9 aldehydes, 22 aliphatic and 4 alicyclic ketones, in the natural abundance FT.‐NMR. spectra followed a good correlation with the ^13^C‐chemical shifts of the terminal C‐atoms of corresponding methylene compounds. An additivity relation involving 6 parameters represents the ^17^O‐shifts of 28 of the measured products with a standard deviation of 2.5 ppm. The additivity parameters are discussed with respect to the modifications of the polarity of the carbonyl group induced by the hyperconjugative interaction of π and π* orbitals with the πCH~3~ orbitals of the alkyl substituent groups.


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