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1H NMR spectra and electronic structure of 3-arylmethyl-idenephthalide and 3-arylthiomethylidenephthalide derivatives

✍ Scribed by M. Vida; V. Kellö; T. Liptaj; A. Perjéssy; P. Hrnčiar; M. Lácová

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
353 KB
Volume
6
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^1^H NMR spectra of trans‐3‐phenylmethylidenephthalide and trans‐3‐phenylthiomethylidenephthalide derivatives were investigated. After applying a correction for the anisotropy of substituents and/or for changes of ring current in the substituted aromatic ring, linear correlations were obtained between the chemical shifts of protons of the substituted phenyl group and the methine group and s̀ constants of substituents. The influence of the bridge heteroatom on the transfer of electronic effects of substituents through the molecules under study is discussed.

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