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Investigation of substituent effects on the 1H NMR spectra of chalcones

✍ Scribed by E. Solčániová; S. Toma

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
259 KB
Volume
14
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^1^H NMR spectra of 26 substituted chalcones (3‐aryl‐1 phenyl‐2‐propene‐1‐ones and 1‐aryl‐3‐phenyl‐2‐propene‐1‐ones) have been studied. The chemical shifts of the α and β protons to the carbonyl group were correlated with Hammett s̀ parameters. To gain information on the effect of the transmission of the resonance and inductive contributions of the substituents on the chemical shifts of H‐α and H‐β, two parameter correlations with 𝒻 and 𝓇 parameters were also perfomed. The chemical shifts of the aromatic protons of the para‐disubstituted benzene ring correlated with the a~i~ substituent increments.

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