ISSN:
0020-7608
Keywords:
Computational Chemistry and Molecular Modeling
;
Atomic, Molecular and Optical Physics
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A three-dimensional potential energy surface for the 2A′ ground state of the system (Ne—H2)+ (2Σ+ in collinear geometry) has been calculated at SCF and CEPA levels. This surface describes the abstraction reaction \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Ne} + {\rm H}^ + _2 \to {\rm NeH}^{\rm + } + {\rm H}, $$\end{document} which is endoergic by 0.57 eV (ΔH00) and has been studied recently by different experimental groups at low collision energies. Our CEPA calculations yield an endoergicity of 0.55 eV (ΔH00). The 2A′ surface has a minimum at collinear geometry with RNe - H = 2.29 a0 and RH—H = 2.08 a0 and a well depth of 0.49 eV relative to Ne + H+2. The effects of electron correlation on the shape of the surface and on the well depth are discussed.An analytic fit of the collinear part of the surface has been constructed based on Simon's proposal of using polynomials in the coordinates (R—Re)/R instead of (R—Re). The fitted potential is used for quantum mechanical scattering calculations with the finite element method (FEM). Preliminary results for reaction probabilities for H+2 in different vibrationally excited states are given and compared to the experimental results.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/qua.560380229
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