Vibrational and rotational relaxation of the ν(C—Br) mode of 2-bromopropane

Abstract

Rotational and vibrational relaxation of pure liquid 2-bromopropane (2BrP) at different temperatures and in various solvents (carbon tetrachloride, cyclohexane, acetonitrile, n-hexane) at 288 K and c= 5.3 mol l^–1 was studied by Raman band-shape analysis of the ν(C—Br) mode. The pure dephasing band width in acetonitrile solutions was determined from the dependence of isotropic Raman band width vs. concentration. The activation energy of the molecular reorientation for 2BrP molecules was also determined. The experimental vibrational correlation functions were compared with the theoretical Kubo–Rothschild and Oxtoby models.