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J. Phys. Chem. C 2007, 111, 15686-15699
Anisotropic United Atom Model Including the Electrostatic Interactions of Methylbenzenes. I. Thermodynamic and Structural Properties† Carlos Nieto-Draghi,* Patrick Bonnaud, and Philippe Ungerer IFP, 1-4 AVenue de Bois-Pre´ au, 92852 Rueil-Malmaison, Cedex, France ReceiVed: May 15, 2007; In Final Form: August 24, 2007
An optimization of the carbon force centers connecting the aromatic ring with methyl groups was performed to extend the new Anisotropic United Atoms (AUA) intermolecular potential recently developed for benzene molecules that include electrostatic interactions [Bonnaud, P.; Nieto-Draghi, C.; Ungerer, P. J. Phys. Chem. B 2007, 111, 3730-3741]. The new potential has been tested by computing thermodynamic and structural properties of methylbenzenes using Gibbs Ensemble, NPT Monte Carlo simulations. A comprehensive comparison of the new model is given with other intermolecular potentials taken from the literature. Overall thermodynamic and structural properties of our optimized model are in very good agreement with experimental data, represented by an absolute average deviation of
