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An angle dependent site-renormalized theory for the conformations of n-butane in a simple fluid

The angular dependent site-renormalized integral equation theory is developed to compute the dihedral conformation distribution and intermolecular pair distributions of n-butane at infinite dilution in a Lennard-Jones solvent. The equations take advantage of the topological diagrammatic expansion...

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Bibliographic Details
Main Authors: Dyer, K., Perkyns, J., Pettitt, B., Stell, G.
Format: Article
Language:English
Published: Інститут фізики конденсованих систем НАН України 2007
Series:Condensed Matter Physics
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/118697
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Summary:The angular dependent site-renormalized integral equation theory is developed to compute the dihedral conformation distribution and intermolecular pair distributions of n-butane at infinite dilution in a Lennard-Jones solvent. The equations take advantage of the topological diagrammatic expansion of the full angular dependent molecular system by resumming the series in conjunction with the intramolecular degree of freedom. To first order in an angular basis set, the numerical results of these site-renormalized equations are a systematic quantitative improvement over previous methods. In particular, the thermodynamics and conformational distribution of the solute are essentially indistinguishable from simulation.