Editing Methane

{{Jmol_general|methane.pdb|Methane}}
'''Methane''' (CH<sub>4</sub>) is the first in the homologous series of [[Realistic_models#Alkanes |alkanes]].
==Lennard-Jones parameters==
Methane is sometimes simulated as a single [[Lennard-Jones model |Lennard-Jones site]] using a [[united-atom model]].
Some Lennard-Jones parameters for methane are listed in the following table:
{| border="1"
|- 
| [[Force fields|Force-field]] || <math>\epsilon/k_B</math> (K) || <math>\sigma</math>  (nm)|| Reference
|- 
| [[OPLS]] || 147.9   || 0.373 || <ref>[http://dx.doi.org/10.1021/ja00334a030 William L. Jorgensen, Jeffry D. Madura, Carol J. Swenson "Optimized intermolecular potential functions for liquid hydrocarbons", Journal of the American Chemical Society '''106''' pp. 6638–6646 (1984)]</ref>
|- 
| [[TraPPE]]   || 148   ||  0.373    || <ref>[http://dx.doi.org/10.1021/jp972543+  Marcus G. Martin and J. Ilja Siepmann "Transferable potentials for phase equilibria. 1. United-atom description of n-alkanes,", The Journal of Physical Chemistry B '''102''', pp. 2569-2577 (1998)]</ref>
|}
==Three-body model==
A Hauschild and Prausnitz <ref>[http://dx.doi.org/10.1080/08927029308022507 T. Hauschild and J. M. Prausnitz "Monte-Carlo Calculations for Methane and Argon over a Wide Range of Density and Temperature, Including the Two-Phase Vapor-Liquid Region", Molecular Simulation '''11''' pp. 177-185 (1993)]</ref> like [[Many-body interactions | three-body potential]] has been developed by Abbaspour <ref>[http://dx.doi.org/10.1016/j.molliq.2011.04.002 M. Abbaspour "Computation of some thermodynamics, transport, structural properties, and new equation of state for fluid methane using two-body and three-body intermolecular potentials from molecular dynamics simulation", Journal of Molecular Liquids '''161''' pp. 30-35 (2011)]</ref>, building on the OPLS model.

==Plastic crystal phase==
The methane has a [[Plastic crystals |plastic crystal]] phase.
*[http://dx.doi.org/10.1063/1.439027 David G. Bounds, Michael L. Klein, and G. N. Patey "Molecular dynamics simulation of the plastic phase of solid methane", Journal of Chemical Physics '''72''' pp. 5348-5356 (1980)]
*[http://dx.doi.org/10.1103/PhysRevLett.77.2638  M. H. Müser and B. J. Berne "Path-Integral Monte Carlo Scheme for Rigid Tops: Application to the Quantum Rotator Phase Transition in Solid Methane", Physical Review Letters '''77''' pp. 2638-2641 (1996)]

==Transport properties==
<ref>[http://dx.doi.org/10.1063/1.4896538  C. G. Aimoli, E. J. Maginn and C. R. A. Abreu "Transport properties of carbon dioxide and methane from molecular dynamics simulations", Journal of Chemical Physics '''141''' 134101 (2014)]</ref>.
==References==
<references/>
'''Related reading'''
*[http://dx.doi.org/10.1080/00268977900103151 S. Murad,  D. J. Evans,  K. E. Gubbins, W. B. Streett and D. J. Tildesley "Molecular dynamics simulation of dense fluid methane", Molecular Physics '''37''' pp. 725-736 (1979)]
*[http://dx.doi.org/10.1080/0892702031000117270 Josep C. Pamies,  Clare McCabe,  Peter T. Cummings and Lourdes F. Vega "Coexistence Densities of Methane and Propane by Canonical Molecular Dynamics and Gibbs Ensemble Monte Carlo Simulations", Molecular Simulation '''29''' pp. 463-470 (2003)]
*[http://dx.doi.org/10.1063/1.4905526  Steven L. Mielke, and Donald G. Truhlar "Improved methods for Feynman path integral calculations and their application to calculate converged vibrational–rotational partition functions, free energies, enthalpies, entropies, and heat capacities for methane", Journal of Chemical Physics '''142''' 044105 (2015)]
*[http://dx.doi.org/10.1063/1.4919079  Joyjit Chattoraj, Tobias Risthaus, Oliver Rubner, Andreas Heuer and Stefan Grimme "A multi-scale approach to characterize pure CH4, CF4, and CH4/CF4 mixtures", Journal of Chemical Physics '''142''' 164508 (2015)]
*[http://dx.doi.org/10.1063/1.4962261  Alec Owens, Sergei N. Yurchenko, Andrey Yachmenev, Jonathan Tennyson and Walter Thiel "A highly accurate ab initio potential energy surface for methane", Journal of Chemical Physics '''145''' 104305 (2016)]
*[http://dx.doi.org/10.1063/1.4961973  A. V. Nikitin, M. Rey and Vl. G. Tyuterev "First fully ab initio potential energy surface of methane with a spectroscopic accuracy", Journal of Chemical Physics '''145''' 114309 (2016)]


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