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Critical analysis and extension of the Hirshfeld atoms in molecules

The computational approach to the Hirshfeld [Theor. Chim. Acta 44, 129 (1977)] atom in a molecule is critically investigated, and several difficulties are highlighted. It is shown that these difficulties are mitigated by an alternative, iterative version, of the Hirshfeld partitioning procedure. The iterative scheme ensures that the Hirshfeld definition represents a mathematically proper information entropy, allows the Hirshfeld approach to be used for charged molecules, eliminates arbitrariness in the choice of the promolecule, and increases the magnitudes of the charges. The resulting "Hirshfeld-I charges" correlate well with electrostatic potential derived atomic charges

© Journal of Chemical Physics, 2007, vol. 126, núm. 14

American Institute of Physics

Author: Bultinck, Patrick
Alsenoy, Christian van
Ayers, Paul W.
Carbó-Dorca, Ramon
Date: 2007
Abstract: The computational approach to the Hirshfeld [Theor. Chim. Acta 44, 129 (1977)] atom in a molecule is critically investigated, and several difficulties are highlighted. It is shown that these difficulties are mitigated by an alternative, iterative version, of the Hirshfeld partitioning procedure. The iterative scheme ensures that the Hirshfeld definition represents a mathematically proper information entropy, allows the Hirshfeld approach to be used for charged molecules, eliminates arbitrariness in the choice of the promolecule, and increases the magnitudes of the charges. The resulting "Hirshfeld-I charges" correlate well with electrostatic potential derived atomic charges
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Citation: Bultinck, Patrick, Van Alsenoy, Christian, Ayers, Paul W., i Carbó-Dorca, Ramon (2007). Critical analysis and extension of the Hirshfeld atoms in molecules. Journal of Chemical Physics 126 (14), 144111. Recuperat 27 desembre 2010, a http://jcp.aip.org/resource/1/jcpsa6/v126/i14/p144111_s1
ISSN: 0021-9606 (versió paper)
1089-7690 (versió electrònica)
Document access: http://hdl.handle.net/10256/3198
Language: eng
Publisher: American Institute of Physics
Collection: Reproducció digital del document publicat a: http://dx.doi.org/10.1063/1.2715563
Articles publicats (D-Q)
Is part of: © Journal of Chemical Physics, 2007, vol. 126, núm. 14
Rights: Tots els drets reservats
Subject: Dinàmica molecular
Electrostàtica
Enllaços químics
Entropia
Estructura electrònica
Mètodes iteratius (Matemàtica)
Chemical bonds
Electronic structure
Electrostatics
Entropy
Iterative methods
Molecular dynamics
Title: Critical analysis and extension of the Hirshfeld atoms in molecules
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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