Abstract

A van der Waals molecule (VDWM) consists of atoms or molecules held together by intermolecular attractions [1]. These relatively weak interactions, on the order of 10–100 wavenumbers, are responsible for such phenomena as deviation of real gases from ideality and condensation of molecules into liquids and solids. One class of VDWM’s that has attracted attention is the triatomic complex X⋯BC, where X represents a rare gas atom. Of particular interest is the mechanism by which vibrational energy in the chemical bond BC is transferred to the van der Waals bond X⋯B, resulting in dissociation into X and BC. Both experimental [1,2] and theoretical [3–5] investigations of this process of vibrational predissociation (VP) have been carried out.

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