Jouko Hyomaki

Fluoroalcohols—XX: Infrared and Raman spectra of hexafluoro-2-propanol and its deuterated analogues

Abstract The infrared spectra of hexafluoro-2-propanol and its three deuterated analogues in the gaseous, liquid and solid states and the Raman spectra of the compounds in the liquid state were recorded. Assignments of the vibration bands are made, and especially the vibrations related to the OH and OD groups are discussed. Two bands due to C 1 and C 3 , conformers are found in the OH stretching region; several pairs of sum and difference bands related to the lower-frequency ( C 3 ) band are seen in the vapour spectra. Association “fingers” occur in the spectra of the condensed phases between 2600 and 2900 cm −1 . Two association bands due to in-plane OH bending were found in the spectra of (CF 3 ) 2 CHOH. No association band due to OH torsion was found with certainty in the liquid phase spectra of any of the compounds.