Organic Magnetic Resonance p. 55 - 57 (1982)
Update date:2022-08-04
Solcaniova, E.
Hrnciar, P.
Liptaj, T.
Substituent effects on the 13C and 1H 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 and (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 13C and 1H NMR spectroscopy.
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