𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Oxygen-17 and Carbon-13 Nuclear Magnetic Resonance. Chemical shifts of unsaturated carbonyl compounds and acyl derivatives

✍ Scribed by Claude Delseth; Thi Thanh-tâm Nguyên; Jean-Pierre Kintzinger

Publisher
John Wiley and Sons
Year
1980
Tongue
German
Weight
324 KB
Volume
63
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The ^17^O and ^13^C chemical shifts (δ) of 14 α,β‐unsaturated aldehydes and ketones and 33 acyl derivatives RXC = O (X = Cl, OH, OMe, OEt, NH~2~ and R = H or alkyl) have been measured. In the unsaturated carbonyl series, a correlation exists between δ ^17^O and the π electron density at the β‐carbon atom. From this correlation, an δ ^17^O of 530 ppm was extrapolated for the loss of one electron at the oxygen atom. In the acyl series, the δr ^17^O were also sensitive to changes in the polarity of the carbon‐oxygen bond. A partial correlation between ^17^O‐NMR. chemical shifts and the nuclear quadrupole coupling constants exists for aldehydes, ketones, esters and amides but not for acyl chlorides.

📜 SIMILAR VOLUMES

Unusual carbonyl carbon chemical shifts
Unusual carbonyl carbon chemical shifts in the 13C nuclear magnetic resonance spectra of cyclic ketones
✍ Peter Yates; Hillar Auksi; J. A. Gosbee; G. E. Langford; F. N. Maclachlan 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 217 KB

## Abstract The Ketonic ^13^C NMR signals of a series of 6‐hydroxy‐5‐oxobicyclo[2.2.2]oct‐7‐ene‐2‐carboxylic acid lactones and of haplophytine and related __N__‐substituted 3‐piperidinones occur at exceptionally high field; the structural factors which are responsible have been elucidated by compar

Carbon-13 nuclear magnetic resonance spe
Carbon-13 nuclear magnetic resonance spectra of isomeric oxaziridines. Effects of the nitrogen lone pair on carbon-13 chemical shifts
✍ Guy J. Jordan; DeLanson R. Crist 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 280 KB 👁 1 views

## Abstract The carbon‐13 n.m.r. spectra of several oxaziridines were measured. Aliphatic and aromatic __ipso__ carbon atoms __trans__ to the lone pair of nitrogen in oxaziridines were shifted upfield by __c.__ 9 ppm, and 3.4 ppm, respectively, in comparison with isomers of inverted configuration.

Carbon-13, nitrogen-15, oxygen-17 and su
Carbon-13, nitrogen-15, oxygen-17 and sulphur-33 NMR chemical shifts of some sulphur amides and related compounds
✍ A.-M Häkkinen; P. Ruostesuo 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 378 KB

15N, 1 7 0 and 33S N M R chemical shifts were determined for some aliphatic and aromatic sulphonamides, sulphinamides, sulphenamides and related sulphones and sulphoxides. The 1 7 0 and NMR chemical shifts change only slightly for the sulphonyl compounds. In the sulphinyl componnds, on the other han

Carbon-13 nuclear magnetic resonance spe
Carbon-13 nuclear magnetic resonance spectra of juvenile hormone III, some of its derivatives, and of analogous compounds
✍ W. Kuhnz; H. Rembold 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 217 KB 👁 1 views

## Abstract The ^13^C NMR spectra of methyl farnesoate and related compounds, including juvenile hormone III, are presented, as well as those of analogous compounds derived from methyl geranate. Correlations between the homologous derivatives are discussed in terms of substituent influences.