Density-Functional-Based Determination of the CH3-CH4 Hydrogen Exchange Reaction Barrier

Details Density-Functional-Based Determination of the CH3-CH4 Hydrogen Exchange Reaction Barrier Density-Functional-Based Determination of the CH3-CH4 Hydrogen Exchange Reaction Barrier

1994-11-21

arxiv.org/abs/mtrl-th/9411007v1

Physics

Condensed Matter

Materials Science

5 twocolumn pages (needs twocolumn.sty), revtex, 3 figures, To appear in Chem.Phys.Lett

Scientific paper

10.1016/0009-2614(94)01120-6

Due to the overbinding that is inherent in existing {\em local} approximations to the density-functional formalism, certain reaction energies have not been accessible. Since the generalized gradient approximation significantly decreases the overbinding, prospects for density-functional-based reaction dynamics are promising. Results on the generalized-gradient based determination of the CH3-CH4 hydrogen exchange reaction are presented. Including all Born-Oppenheimer effects an energy barrier of 9.5 kcal/Mole is found which is a very significant improvement over the local-density approximation.

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