A hydrogen-bonded system in a liquefied noble gas as an underdamped anharmonic stochastic oscillator

Abstract

IR spectra of HCl complexes with acetonitrile, olefins have been studied and also for the comparison of methanol polymers in solutions of liquefied Xe, Kr, Ar and N₂.

The half-width of the band for HCl complexed with acetonitrile in liquid Kr is 35 cm⁻¹ at 165 K; this is half of that value in Xe at the same temperature and an order of magnitude lower than in standard solvents. Temperature narrowing of this band down to 30 cm⁻¹ has been found on cooling the solution to 120 K. The temperature shift of HCl bands in complexes of moderate strength not referring to self-association was observed. The results obtained are in agreement with the representation of a hydrogen-bonded system as an underdamped ahnarmonic stochastic oscillator.