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Investigation of substituent effects on the 1 H NMR spectra of chalcones
Author(s) -
Solčániová E.,
Toma S.
Publication year - 1980
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270140212
Subject(s) - substituent , chemical shift , chemistry , aryl , benzene , propene , nmr spectra database , ring (chemistry) , spectral line , medicinal chemistry , resonance (particle physics) , proton nmr , computational chemistry , stereochemistry , organic chemistry , catalysis , physics , alkyl , particle physics , astronomy
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 and parameters were also perfomed. The chemical shifts of the aromatic protons of the para ‐disubstituted benzene ring correlated with the a i substituent increments.