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A Topological Data Analysis Perspective on Non-Covalent Interactions in Relativistic Calculations

Małgorzata Olejniczak 1, * André Severo Pereira Gomes 2 Julien Tierny 3
* Corresponding author
2 PCMT - Physico-Chimie Moléculaire Théorique
PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523
Abstract : Topological Data Analysis (TDA) is a powerful mathematical theory, largely unexplored in theoretical chemistry. In this work we demonstrate how TDA provides new insights into topological features of electron densities and reduced density gradients, by investigating the effects of relativity on the bonding of the Au4‐S‐C6H4‐S′‐Au′4 molecule. Whereas recent analyses of this species carried out with the Quantum Theory of Atoms‐In‐Molecules (a previous study) concluded, from the emergence of new topological features in the electron density, that relativistic effects yielded noncovalent interactions between gold and hydrogen atoms, we show from their low persistence values (which decrease with increased basis set size) these features are not significant. Further analysis of the reduced density gradient confirms no relativity‐induced noncovalent interactions in Au4‐S‐C6H4‐S′‐Au′4. We argue TDA should be integrated into electronic structure analysis methods, and be considered as a basis for the development of new topology‐based approaches.
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Submitted on : Monday, August 5, 2019 - 11:37:04 AM
Last modification on : Thursday, January 23, 2020 - 8:46:02 AM

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Małgorzata Olejniczak, André Severo Pereira Gomes, Julien Tierny. A Topological Data Analysis Perspective on Non-Covalent Interactions in Relativistic Calculations. International Journal of Quantum Chemistry, Wiley, 2019, e26133, ⟨10.1002/qua.26133⟩. ⟨hal-02263579⟩



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