Journal
CHEMICAL PHYSICS LETTERS
Volume 350, Issue 3-4, Pages 286-296Publisher
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DOI: 10.1016/S0009-2614(01)01297-0
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A new method is proposed to calculate bond energies and equilibrium distances in atom-molecule van der Waals complexes which arises from a balancing between long-range attraction and asymptotic tail of the repulsion. The method. based on correlation formulas between the polarizability of the interacting partners and the main interaction parameters, is an extension of an approach originally developed for atom-atom cases. The basic idea exploits the concept of bond polarizability additivity to represent both the molecular repulsion, in terms of a size which is mainly ascribed to the molecular bonds nearest to the probe atom, and the molecular attraction as due to multi-dispersion centers delocalized on the molecular frame. The method, mainly tested on hydrocarbon-rare gas complexes, can be considered as the starting point for the study of systems of higher complexity. (C) 2001 Elsevier Science B.V. All rights reserved.
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