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- Title
Assessment of standard force field models against high-quality ab initio potential curves for prototypes of π–π, CH/π, and SH/π interactions.
- Authors
SHERRILL, C. DAVID; SUMPTER, BOBBY G.; SINNOKROT, MUTASEM O.; MARSHALL, MICHAEL S.; HOHENSTEIN, EDWARD G.; WALKER, ROSS C.; GOULD, IAN R.
- Abstract
Several popular force fields, namely, CHARMM, AMBER, OPLS-AA, and MM3, have been tested for their ability to reproduce highly accurate quantum mechanical potential energy curves for noncovalent interactions in the benzene dimer, the benzene-CH4 complex, and the benzene-H2S complex. All of the force fields are semi-quantitatively correct, but none of them is consistently reliable quantitatively. Re-optimization of Lennard-Jones parameters and symmetry-adapted perturbation theory analysis for the benzene dimer suggests that better agreement cannot be expected unless more flexible functional forms (particularly for the electrostatic contributions) are employed for the empirical force fields. © 2009 Wiley Periodicals, Inc. J Comput Chem, 2009
- Subjects
SUPRAMOLECULAR chemistry; BIOMOLECULES; CRYSTALS; GEOMETRY; PERTURBATION theory
- Publication
Journal of Computational Chemistry, 2009, Vol 30, Issue 14, p2187
- ISSN
0192-8651
- Publication type
Article
- DOI
10.1002/jcc.21226