Spectroscopic studies of the SO2 discharge system. II. Microwave spectrum of the SO dimer

Abstract

Microwave spectra assignable to a dimer of SO have been detected in an electric discharge of SO2. A centrifugal distortion analysis has been carried out on the spectra from the ground state and the lowest excited vibrational state of 16O32S32S16O and the ground vibrational state of 16O32S34S16O. The molecule was found to have a planar cis configuration with the following geometry: r(SO)=1.458(2) Å, rs(SS)=2.0245(6) Å, and ∠SSO=112.7(5)o. The observed dipole moment of OSSO is μ=3.17(10) D.