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Substituent effects on 13C and 1H chemical shifts in 3-benzylidene-2,4-pentanediones

✍ Scribed by E. Solčániova; P. Hrnčiar; T. Liptaj

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
275 KB
Volume
18
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Substituent effects on the ^13^C and ^1^H chemical shifts have been studied for derivatives of 3‐benzylidene‐2, 4‐pentanedione. A significant correlation has been found between chemical shifts of the Z carbonyl group (C‐2) and Hammett constants, while no correlation has been found for the E carbonyl group (C‐4). Attempts have been made to determine the structural factors which influence these effects. The conformation of 3‐benzylidene‐2, 4‐pentanediones has been determined by ^13^C and ^1^H NMR spectroscopy.

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