Volume 111, Issue 9 pp. 1893-1901
Theoretical and Computational Developments

The impact of basis set superposition error on the structure of ππ dimers

Dolly Vijay

Dolly Vijay

Molecular Modeling Group, Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India

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Hidehiro Sakurai

Hidehiro Sakurai

Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, Myodaiji, Okazaki 444-8787, Japan and PRESTO, Japan Science and Technology Agency, Tokyo 102-0075, Japan

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G. Narahari Sastry

Corresponding Author

G. Narahari Sastry

Molecular Modeling Group, Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India

Molecular Modeling Group, Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, IndiaSearch for more papers by this author
First published: 21 April 2011
Citations: 39

Abstract

The effect of basis set superposition error (BSSE) on the structure and energy of benzene, naphthalene, corannulene, and sumanene dimer has been analyzed. MP2 method was chosen and the effect is estimated using 6-31G, 6-31G(d), 6-311+G(d), cc-pVDZ, and cc-pVTZ basis sets. The model calculations on benzene dimer indicate that the impact of BSSE on the equilibrium geometry of π-stacked dimers appears to be quite significant. Calculations on larger molecular dimers such as the dimers of naphthalene, corannulene, and sumanene are also studied. The practical implication of the current observation on modeling the macromolecular structure is discussed. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2011

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