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Title: Comment on “Isolating the non-polar contributions to the intermolecular potential for water-alkane interactions” [J. Chem. Phys. 141, 064905 (2014)]

The manuscript by Ballal et al.(Ref 1) presents an interesting study demonstrating the inability of popular force fields with standard combination rules to accurately describe water/alkane interactions. The authors find that the Lorentz-Berthelot combination rules on the SPC/E water and TraPPE alkane potentials give a cross interaction that fails to predict the (low-water content) water solubility in various alkanes. Realizing that both explicit polarization as well as the static octupole moment of methane are missing in these potentials, the authors examine the effect of these terms, but are still unable to resolve the discrepancy. They conclude with the statement that “the research community lacks a complete picture of water-alkane interactions at the molecular level.
 [1] ; ORCiD logo [1]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Chemistry
Publication Date:
Report Number(s):
NoneDOE-UWMadison-46938-3rd product
Journal ID: ISSN 0021-9606; DE-FG02-13ER46938
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 144; Journal Issue: 13; Journal ID: ISSN 0021-9606
American Institute of Physics (AIP)
Research Org:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
36 MATERIALS SCIENCE; molecular dynamics; alkane; water
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1245684