Ab initio potential energy surface for the carbon dioxide molecule pair and thermophysical properties of dilute carbon dioxide gas
Publication date
2014-10-03
Document type
Research article
Author
Organisational unit
Universität Rostock
Scopus ID
ISSN
Series or journal
Chemical Physics Letters
Periodical volume
613
First page
133
Last page
138
Peer-reviewed
✅
Part of the university bibliography
Nein
Abstract
A four-dimensional intermolecular potential energy surface (PES) for two rigid carbon dioxide molecules was determined from quantum-chemical ab initio calculations. Interaction energies for 1229 CO₂-CO₂ configurations were computed at the CCSD(T) level of theory using basis sets up to aug-cc-pVQZ supple-mented with bond functions. An analytical site-site potential function with seven sites per CO₂ molecule was fitted to the interaction energies. The PES was validated by calculating the second virial coefficient as well as viscosity and thermal conductivity in the dilute-gas limit.
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Not applicable (or unknown)
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