Infrared Spectrum of S16O18O and the Potential Constants of SO2

Abstract

An investigation of the infrared spectrum of S16O18O results in the following frequency assignment: ν1=1122±1 cm−1, ν2=506.8±0.5 cm−1, ν3=1341±0.5 cm−1. These data combined with the fundamental frequencies of S16O2 have been used to calculate the potential constants for sulfur dioxide. These are fd=10.02, fdd=0.03, 1dfdα=0.20, 1d2fα=0.793.