The use of atomic intrinsic polarizabilities in the evaluation of the dispersion energy

András Olasz, Kenno Vanommeslaeghe, Alisa Krishtal, Tamás Veszpŕmi, Christian Van Alsenoy, Paul Geerlings

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30 Scopus citations

Abstract

The recent approach presented by Becke and Johnson [J. Chem. Phys. 122, 154104 (2005); 123, 024101 (2005); 123, 154101 (2005); 124, 174104 (2006); 124, 014104 (2006)] for the evaluation of dispersion interactions based on the properties of the exchange-hole dipole moment is combined with a Hirshfeld-type partitioning for the molecular polarizabilities into atomic contributions, recently presented by some of the present authors [A. Krishtal, J. Chem. Phys. 125, 034312 (2006)]. The results on a series of nine dimers, involving neon, methane, ethene, acetylene, benzene, and C O2, taken at their equilibrium geometry, indicate that when the C6, C8, and C10 terms are taken into account, the resulting dispersion energies can be obtained deviating 3% or 8% from high level literature data [E. R. Johnson and A. D. Becke, J. Chem. Phys. 124, 174104 (2006)], without the use of a damping function, the only outlier being the parallel face-to-face benzene dimer.

Original languageEnglish (US)
Article number224105
JournalJournal of Chemical Physics
Volume127
Issue number22
DOIs
StatePublished - 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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