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Investigation of substituent effects of chalcones by 13C n.m.r. spectroscopy

✍ Scribed by E. Soĺǎniová; Š. Toma; S. Gronowitz

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
450 KB
Volume
8
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^13^C chemical shifts for 23 para‐ and meta‐substituted chalcones of the types 1 and 2 have been determined. The aromatic shieldings are compared with previous results for other aromatic derivatives. Correlations of the ^13^C chemical shifts of vinyl carbons and carbonyl carbons as well as ring carbons with Hammett σ parameters, π electron densities and the reactivity parameters of Swain and Lupton provide a consistent picture of electronic effects transmitted through the carbon framework of the compounds studied.

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