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Title

Ab initio ground state potential energy surfaces for Rg–Br2 (Rg = He, Ne, Ar) complexes

AuthorsProsmiti, Rita CSIC ORCID; Cunha, Carlos; Villarreal, Pablo CSIC ORCID; Delgado Barrio, Gerardo CSIC ORCID
KeywordsInert gas compounds
Bromine compounds
Ab initio calculations
Potential energy surfaces
Molecular electronic states
Issue Date1-Jun-2002
PublisherAmerican Institute of Physics
CitationJournal of Chemical Physics 116(21): 9249 (2002)
AbstractHigh-level ab initio molecular electronic structure calculations are performed for Rg–Br2 (Rg = He, Ne, Ar) complexes at CCSD(T) (coupled cluster using single and double excitations with a noniterative perturbation treatment of triple excitations) level of theory. Specific augmented correlation consistent basis sets are used for each noble atom (Rg), supplemented with an additional set of bond functions. Effective-core potentials (ECPs), augmented with diffusion (sp) and polarization (3df ) functions, have been employed for the bromine atoms. For all complexes, the CCSD(T) potential energy surfaces (PESs) show double-minimum topology, with wells at both linear and T-shaped configurations; the linear minimum is found to be deeper than the T-shaped one. Vibrational corrections are taken into account for all the complexes and their effects in the stability of the linear and T-shaped conformers are examined. For each complex and each configuration (linear and T-shaped), Re equilibrium intermolecular distances, De and D0 dissociation energies, are evaluated and compared with previous theoretical and/or experimental results.
Description6 pages, 3 figures, 5 tables.-- PACS: 31.15.Ar; 31.15.Dv; 33.15.Bh; 33.15.Mt
Publisher version (URL)http://dx.doi.org/10.1063/1.1473800
URIhttp://hdl.handle.net/10261/21687
DOI10.1063/1.1473800
ISSN0021-9606
Appears in Collections:(CFMAC-IFF) Artículos

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