Net atomic charges are derived from a least-squares fitting to electrostatic potentials at atomic sites. The method treats atoms in the molecule as having spherically averaged Hartree-Fock densities, the atomic densities overlapping with one another. The method has the advantage of best reproducing
A combined electronegativity equalization and electrostatic potential fit method for the determination of atomic point charges
✍ Scribed by Imre Berente; Eszter Czinki; Gábor Náray-szabó
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 276 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0192-8651
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✦ Synopsis
Abstract
We report an approach for the determination of atomic monopoles of macromolecular systems using connectivity and geometry parameters alone. The method is appropriate also for the calculation of charge distributions based on the quantum mechanically determined wave function and does not suffer from the mathematical instability of other electrostatic potential fit methods. © 2007 Wiley Periodicals, Inc. J Comput Chem, 2007
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## Abstract The present work provides a detailed investigation on the use of singular value decomposition (SVD) to solve the linear least‐squares problem (LLS) for the purposes of obtaining potential‐derived atom‐centered point charges (PD charges) from the __ab initio__ molecular electrostatic pot