Hydrogen bonding of N-monosubstituted amides. IR and NMR study of N-butylbenzamides

The self-association through hydrogen bonding of N-butylbenzamides has been studied by infrared spectroscopy in carbon tetrachloride, chloroform and benzene. The spectroscopic characteristics and thermodynamic parameters for the self-association have been determined. Also, the carbon tetrachloride and chloroform solutions of the amides have been studied by 1H NMR spectroscopy. The equilibrium constants for self-association obtained by NMR technique are in good agreement with the corresponding values from infrared measurements.