Microsolvation of heavy halides

Yuly Chamorro, Edison Flórez, Alejandro Maldonado, Gustavo Aucar, Albeiro Restrepo*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)
131 Downloads (Pure)

Abstract

The fundamental question of how intermolecular interactions lead to the stabilization of heavy halides (Br, I, At) microsolvated with up to six explicit water molecules is addressed here. An exhaustive exploration of the potential energy surfaces using a random search algorithm followed by optimization of molecular geometries using pseudopotentials and at the full four component relativistic levels of theory, affords a good number of structures with high probabilities of occurrence, highlighting the important role of local minima to reproduce experimentally measured properties. Sequential hydration enthalpies for astatide are reported here for the first time in the scientific literature. Closed shell (ionic, long range) as well as intermediate character interactions (contributions from closed shell and covalent) are at play stabilizing the clusters. The ability of water molecules to either donate or to accept electron density dictates the nature and strength of the corresponding hydrogen bonds in solvation shells. Binding energies and molecular geometries are shown to be more sensitive to electron correlation than to relativistic effects.

Original languageEnglish
Article numbere26571
Number of pages12
JournalInternational Journal of Quantum Chemistry
Volume121
Issue number7
DOIs
Publication statusPublished - 5-Apr-2021

Keywords

  • heavy halides
  • intermolecular interactions
  • microsolvation
  • potential energy surfaces
  • relativistic effects

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