Knowledge Bank

The vibrational structure of the $\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}B2$ system has been interpreted in terms of a double minimum potential in the antisymmetric stretch vibration and strong anharmonic coupling between the symmetric and antisymmetric stretches. The results of recent rotational analyses and $S18O2$ vibrational isotope shifts have also been incorporated. The present analysis gives a barrier height considerably lower than that derived previously by Coon and his co-$workers,1$ although their assignments have, in general, been confirmed.