Methane
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Methane (CH4) is the first in the homologous series of alkanes.
Lennard-Jones parameters
Methane is sometimes simulated as a single Lennard-Jones site using a united-atom model. Some Lennard-Jones parameters for methane are listed in the following table:
| Force-field | (K) | (nm) | Reference |
| OPLS | 147.9 | 0.373 | [1] |
| TraPPE | 148 | 0.373 | [2] |
Plastic crystal phase
The methane has a plastic crystal phase.
- 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)
- 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)
Critical properties
The pressure, temperature and density at the critical point have been calculated for a virial equation of state using the TraPPE-UA force field, and are given in Table I of [3].
References
- ↑ 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)
- ↑ 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)
- ↑ Andrew J. Schultz and David A. Kofke "Virial coefficients of model alkanes", Journal of Chemical Physics 133 104101 (2010)
Related reading
- 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)
- 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)