Effect of the Orientation of Substituents on the Chemical Shifts of 13C. IV-13C NMR Spectra of N,N-diisopropylamides and -thioamides

Article abstract of DOI:10.1002/mrc.1270160111

N,N-diisopropylamides and -thioamides show hindered rotation around the N-CH bonds, and presence of mixtures of conformational isomers can be demonstrated at temperatures below 273 K in solution. 1H and 13C NMR spectra of these conformers are measured and