1H and 13C NMR spectra of 4,4′-substituted chalcones

1H and 13C NMR spectra of chalcone (trans-benzylideneacetophenone) and 54 4,4′-substituted chalcones were studied. The 400 MHz 1H NMR and the 13C NMR spectra were observed, analysed and assigned and the substituent constants were calculated by the least-squares method.