A method for calculating the electrostatic energy between small polar molecules. The multipole-fitted point-charge method
- 1 January 1982
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 78 (11) , 1853-1870
- https://doi.org/10.1039/f29827801853
Abstract
A comparison is made between the one-centre multipole expansion and point-charge models of the electrostatic interaction energy for the dimers of HF, HCl and H2O. Comparison with the exact electrostatic energy shows that the point-charge models are more accurate for equivalent levels of computational difficulty. For H2O a comparison is made between three-charge and four-charge models and the four-charge models show no significant improvement over the best three-charge model. Optimum parameters based on experimental and computed moments are given for this three-charge model.Keywords
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