title: Stereodynamics in the Collisional Autoionization of Water, Ammonia, and Hydrogen Sulfide with Metastable Rare Gas Atoms: Competition Between Intermolecular Halogen and Hydrogen Bonds.
abstract: Recent experiments on the title subject, performed with a high-resolution crossed-beam apparatus, have provided the total ionization cross sections as a function of the collision energy between noble gas atoms, electronically excited in their metastable states (Ng*), and H2 O, H2 S, and NH3 reagents, as well as the emitted electron energy spectra. This paper presents a rationalization of all the experimental findings in a unifying picture to cast light on the basic chemical properties of Ng* under conditions of great relevance both from a fundamental and from an applied point of view. The importance of this investigation is that it isolates the selective role of the intermolecular halogen and hydrogen bonds, to assess their anisotropic effects on the stereodynamics of the promoted ionization reactions, and to model energy transfer and reactivity in systems of applied interest, such as planetary atmospheres, plasmas, lasers, and flames.
authors.affiliation: Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia (Italy).
authors.forename: Stefano
authors.initials: S
authors.lastname: Falcinelli
authors.affiliation: Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di sotto 8, 06123 Perugia (Italy).
authors.forename: Alessio
authors.initials: A
authors.lastname: Bartocci
authors.affiliation: Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di sotto 8, 06123 Perugia (Italy).
authors.forename: Simonetta
authors.initials: S
authors.lastname: Cavalli
authors.affiliation: Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di sotto 8, 06123 Perugia (Italy).
authors.forename: Fernando
authors.initials: F
authors.lastname: Pirani
authors.affiliation: Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia (Italy). vecchio@dyn.unipg.it.
authors.forename: Franco
authors.initials: F
authors.lastname: Vecchiocattivi
keywords: autoionization reactions; halogen bonds; hydrogen bonds; hydrogenated molecules; stereodynamics