13C NMR Study of ortho-, meta- and para-Alkoxycarbonylalkyloxychalcones and Their α,β-Dibromo Derivatives

Article abstract of DOI:10.1002/mrc.1260270419

The 13C NMR spectra of eighteen new derivatives of chalcone have been recorded, calculated and fully assigned.The A_i empirical parameters of the styrylketone , p-alkoxycarbonylalkyloxystyrylketone and benzoylethylene group were calculated for the prediction of the chemical shifts of substituted benzenes and chalcones. KEY WORDS Chalcone Alkoxycarbonyl-alkoxy-chalcone α,β-Dibromochalcone 13C NMR Chemical Shifts A_i empirical parameters