Internal dynamics in 2,4,6, triodophenol

Abstract The conformational changes in 2,4,6 triodophenol along the internal rotation itinerary of the OH and OD groups have been studied by infrared and Raman spectroscopy. It is shown that the tilt angle between the CO bond and the aromatic plane undergoes a remarkable variation when the hydroxyl group is deuterated. The hindered rotation potential function associated to the torsional motion has been determined. Tentative assignments for the ψ as o → ψ as 1 and ψ S o → ψ as 1 transitions corresponding to the inversion of the OH and OD groups are also carried out.