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Issue 29, 2017
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On the metastability of doubly charged homonuclear diatomics

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Generalized valence bond (GVB) and spin-coupled (SC) calculations were used in conjunction with the generalized product function energy partitioning (GPF-EP) method to describe the origin of metastability in doubly charged homonuclear dications. A model to describe the formation of metastable potential wells based on interference and quasi-classical effects is presented. The GPF-EP picture of dications is the result of polarization-aided strong covalent bonding surpassing Coulomb electrostatic repulsion. Important differences in the quasi-classical density profiles of He22+ and Ne22+ reveal the underlying mechanism that could lead to bound or unbound states. Finally, the nature of the chemical bond of N22+, O22+, and F22+ is described. The results suggest that the ground states of the mentioned dications are bounded and that the depth of the potential wells of these exotic species is related to the interference effect, in the same way as in previously studied neutral molecules.

Graphical abstract: On the metastability of doubly charged homonuclear diatomics

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Publication details

The article was received on 28 Apr 2017, accepted on 27 Jun 2017 and first published on 30 Jun 2017

Article type: Paper
DOI: 10.1039/C7CP02792C
Citation: Phys. Chem. Chem. Phys., 2017,19, 19352-19359

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    On the metastability of doubly charged homonuclear diatomics

    F. Fantuzzi, T. M. Cardozo and M. A. C. Nascimento, Phys. Chem. Chem. Phys., 2017, 19, 19352
    DOI: 10.1039/C7CP02792C

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