Carbon‐13 chemical shift assignments of derivatives of benzoic acid

Abstract The 13C NMR spectra of 23 di‐ and tri‐substituted derivatives of esters, thioesters and amides of benzoic acids have been calculated and fully assigned. The Ai empirical parameters of the (alkoxy)(dialkoxycar‐bonyl) methylamino, (alkoxy)(alkoxycar‐bonyl)(cyano)methylamino, (alkylamino) (dialkoxycarbonyl) methylamino and (alkylthio) (dialkoxycarbonyl) methylamino groups have been calculated for use in the prediction of the chemical shifts of substituted benzenes.