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AMBER-ii: New Combining Rules and Force Field for Perfluoroalkanes
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Number of Authors: 3
2015 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 119, no 46, 14563-14573 p.Article in journal (Refereed) Published
Abstract [en]

A molecular mechanics force field of the AMBER/OPLS family for perfluoroalkanes, noble gases, and their Mixtures with alkanes has been proposed. We had to abandon the traditional Lorentz Berthelot combining rules for the Lennard-Jones potential to be able to uniformly describe these substance classes and their mixtures. Instead, the Waldman-Hagler rules developed for noble gases were used for all of these elements except hydrogen. Hydrogen is considered to be a particular substance to which the usual Lorentz Berthelot rules are applied. The proposed rules have little effect on the organic chemistry of H, C, N, and O elements but make it compliant with the chemistry of heavy elements. Because of assigning a relatively high partial charge of -0.37e to fluorine atoms, the new force field reproduces the mutual insolubility of higher liquid alkanes and perfluoroalkanes.

Place, publisher, year, edition, pages
2015. Vol. 119, no 46, 14563-14573 p.
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-124746DOI: 10.1021/acs.jpcb.5b07233ISI: 000365463200001PubMedID: 26498002OAI: oai:DiVA.org:su-124746DiVA: diva2:892208
Available from: 2016-01-08 Created: 2016-01-04 Last updated: 2016-01-08Bibliographically approved

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