Eigenstates of Thiophosgene Near the Dissociation Threshold -- Deviations From Ergodicity

A subset of the highly excited eigenstates of thiophosgene (SCCl${}_2$) near the dissociation threshold are analyzed using sensitive measures of quantum ergodicity. We find several localized eigenstates, suggesting that the intramolecular vibrational energy flow dynamics is nonstatistical even at such high levels of excitations. The results are consistent with recent observations of sharp spectral features in the stimulated emission spectra of SCCl${}_2$