DISPERSIVE FOURIER-TRANSFORM FAR-INFRARED SPECTROSCOPY OF ALIPHATIC-KETONES

A dispersive Fourier transform far-infrared spectrometer is used to me asure the optical constants (absorption and refractive index) of a num ber of aliphatic ketones, in the wave number range 20-500 cm(-1). Seve ral previously unreported absorption features of aliphatic ketones at far-infrared frequencies above the Poley region are found. Frequencies of some of the bands are shown to coincide with those calculated and observed by Raman spectroscopy, but others are being discovered for th e first time. It is shown that intermolecular interactions play a sign ificant role in determining the spectral profile in this wave number r ange.