HM+ and HM+‑He (M = Group 2 metal): chemical or physical interactions?

Harris, Joe P. and Dodson, Hannah and Breckenridge, W.H. and Wright, Timothy G. (2014) HM+ and HM+‑He (M = Group 2 metal): chemical or physical interactions? Journal of Chemical Physics, 141 (9). 094306/1-094306/9. ISSN 0021-9606

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We investigate the HM+–He complexes (M = Group 2 metal) using quantum chemistry. Equilibrium geometries are linear for M = Be and Mg, and bent for M = Ca–Ra; the explanation for this lies in the differing nature of the highest occupied molecular orbitals in the two sets of complexes. The difference primarily occurs as a result of the formation of the H–M+ bond, and so the HM+ diatomics are also studied as part of the present work. The position of the He atom in the complexes is largely determined by the form of the electron density. HM+. . . He binding energies are obtained and are surprisingly high for a helium complex. The HBe+. . . He value is almost 3000 cm−1, which is high enough to suspect contributions from chemical bonding. This is explored by examining the natural orbital density and by population analyses.

Item Type: Article
Additional Information: Copyright 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in The journal of chemical physics, v. 141, 094306 (2014) and may be found at
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Chemistry
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Depositing User: WRIGHT, Professor T G
Date Deposited: 03 Jul 2015 12:19
Last Modified: 13 Sep 2016 20:02

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