Basic features of Ne*-HX (X = Cl, Br) chemi-ionization reactions

Stefano Falcinelli; Franco Vecchiocattivi; Brunetto Giovanni Brunetti; Marco Parriani; Giovanni Gigliotti; Stefano Stranges; Fernando Pirani

doi:10.1039/d1ra08904h

Basic features of Ne*-HX (X = Cl, Br) chemi-ionization reactions

RSC Adv. 2022 Mar 8;12(12):7587-7593. doi: 10.1039/d1ra08904h. eCollection 2022 Mar 1.

Authors

Stefano Falcinelli¹, Franco Vecchiocattivi¹, Brunetto Giovanni Brunetti², Marco Parriani¹, Giovanni Gigliotti¹, Stefano Stranges³, Fernando Pirani^{1

2}

Affiliations

¹ Department of Civil and Environmental Engineering, University of Perugia Via G. Duranti 93 06125 Perugia Italy stefano.falcinelli@unipg.it.
² Department of Chemistry, Biology and Biotechnologies, University of Perugia Via Elce di Sotto 8 06123 Perugia Italy.
³ Department of Chemistry and Drug Technologies, University Sapienza Rome 00185 Italy.

Abstract

Total and partial ionization cross sections for Ne*(³P_2,0)-HX (X = Cl, Br) are presented in a comparative way as a function of the collision energy between 0.02-0.5 eV. New mass spectrometric data on Ne*-HBr chemi-ionization are discussed and analyzed with already published data on Ne*-HCl, highlighting similarities and differences of the collisional stereodynamics of the two systems. Basic features of the interaction potentials, driving reactive collisions, suggest that reaction channels, leading to the formation of parent HX⁺ ions in the ground and excited electronic state and to the formation of associated NeHX⁺ ions as well as of NeH⁺ proton transfer species, are selectively opened within angular cones exhibiting different orientation and acceptance.