Infrared and Raman spectra, r0 structural parameters, conformational stability, and vibrational assignment of 2-cyanoethylamine

► The heavy atom and NH2 structural parameters have been determined for the two most abundant forms. ► Vibrational data indicate the presence of four of the five possible conformers. ► Complete vibrational assignments have been obtained for two lowest energy conformers. ► Energy differences have been predicted for the five possible conformers. ► Experimental enthalpy difference has been determined between the two most abundant conformers.