Title
Orbital Energies And Nuclear Forces In Dft: Interpretation And Validation
Abstract
The bonding and antibonding character of individual molecular orbitals has been previously shown to be related to their orbital energy derivatives with respect to nuclear coordinates, known as dynamical orbital forces. Albeit usually derived from Koopmans' theorem, in this work we show a more general derivation from conceptual DFT, which justifies application in a broader context. The consistency of the approach is validated numerically for valence orbitals in Kohn-Sham DFT. Then, we illustrate its usefulness by showcasing applications in aromatic and antiaromatic systems and in excited state chemistry. Overall, dynamical orbital forces can be used to interpret the results of routine ab initio calculations, be it wavefunction or density based, in terms of forces and occupations.
Year
DOI
Venue
2021
10.1002/jcc.26459
JOURNAL OF COMPUTATIONAL CHEMISTRY
Keywords
DocType
Volume
conceptual density functional theory, density functional theory, dynamic orbital forces, nuclear forces, nuclear Fukui function
Journal
42
Issue
ISSN
Citations 
5
0192-8651
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Rubén Laplaza100.34
Carlos Cardenas210.75
Patrick Chaquin331.10
Julia Contreras-Garcia401.01
Paul W Ayers5237.62