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Significance of the resonance effect in determining ring proton magnetic shielding in substituted benzenes and pyridines

✍ Scribed by J.M. Haigh; D.A. Thornton

Publisher
Elsevier Science
Year
1970
Tongue
French
Weight
180 KB
Volume
11
Category
Article
ISSN
0040-4039

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✦ Synopsis

From the theory of chemical shifts, substituent-induced ring proton shifts should depend primarily on the n-electron charge density of the carbon atom to which the proton is bound assuming substituent-independence of the ring current effect and minimal long range substituent effects for meta and para protons. Although large variations in a-proton shielding accompany-

πŸ“œ SIMILAR VOLUMES

Ring current effects on nuclear magnetic
Ring current effects on nuclear magnetic shielding of carbon in the benzene molecule
✍ M. B. Ferraro; F. Faglioni; A. Ligabue; S. Pelloni; P. Lazzeretti πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 204 KB

## Abstract The differential Biot–Savart law of classical electrodynamics was applied to develop a ring current model for the magnetic shielding of the carbon nucleus in benzene. It is shown that the local effect of the Ο€ currents, induced by a magnetic field normal to the molecular plane, on the $