A systematic study of techniques for treating noncovalent interactions within the computationally efficient density functional theory (DFT) framework is presented through comparison to benchmark-quality evaluations of binding strength compiled for molecular complexes of diverse size and nature. In particular, the efficacy of functionals deliberately crafted to encompass long-range forces, a posteriori DFT+dispersion corrections (DFT-D2 and DFT-D3), and exchange-hole dipole moment (XDM) theory is assessed against a large collection (469 energy points) of reference interaction energies at the CCSD(T) level of theory extrapolated to the estimated complete basis set limit. The established S22 [revised in J. Chem. Phys. 132, 144104 (2010)] and JSCH test sets of minimum-energy structures, as well as collections of dispersion-bound (NBC10) and hydrogen-bonded (HBC6) dissociation curves and a pairwise decomposition of a protein–ligand reaction site (HSG), comprise the chemical systems for this work. From evaluations of accuracy, consistency, and efficiency for PBE-D, BP86-D, B97-D, PBE0-D, B3LYP-D, B970-D, M05-2X, M06-2X, ωB97X-D, B2PLYP-D, XYG3, and B3LYP-XDM methodologies, it is concluded that distinct, often contrasting, groups of these elicit the best performance within the accessible double-ζ or robust triple-ζ basis set regimes and among hydrogen-bonded or dispersion-dominated complexes. For overall results, M05-2X, B97-D3, and B970-D2 yield superior values in conjunction with aug-cc-pVDZ, for a mean absolute deviation of 0.41 – 0.49 kcal/mol, and B3LYP-D3, B97-D3, ωB97X-D, and B2PLYP-D3 dominate with aug-cc-pVTZ, affording, together with XYG3/6-311+G(3df,2p), a mean absolute deviation of 0.33 – 0.38 kcal/mol.
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28 February 2011
Research Article|
February 25 2011
Density-functional approaches to noncovalent interactions: A comparison of dispersion corrections (DFT-D), exchange-hole dipole moment (XDM) theory, and specialized functionals
Lori A. Burns;
Lori A. Burns
1Center for Computational Molecular Science and Technology, School of Chemistry and Biochemistry,
Georgia Institute of Technology
, Atlanta, Georgia 30332-0400, USA
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Álvaro Vázquez- Mayagoitia;
Álvaro Vázquez- Mayagoitia
2Department of Chemistry,
University of Tennessee
, Knoxville, Tennessee 37996-1600, USA
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Bobby G. Sumpter;
Bobby G. Sumpter
3Computer Science and Mathematics Division and Center for Nanophase Materials Sciences,
Oak Ridge National Laboratory
, Oak Ridge, Tennessee 37831-6367, USA
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C. David Sherrill
C. David Sherrill
a)
1Center for Computational Molecular Science and Technology, School of Chemistry and Biochemistry,
Georgia Institute of Technology
, Atlanta, Georgia 30332-0400, USA
4School of Computational Science and Engineering,
Georgia Institute of Technology
, Atlanta, Georgia 30332-0280, USA
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a)
Electronic mail: [email protected].
J. Chem. Phys. 134, 084107 (2011)
Article history
Received:
November 22 2010
Accepted:
December 28 2010
Citation
Lori A. Burns, Álvaro Vázquez- Mayagoitia, Bobby G. Sumpter, C. David Sherrill; Density-functional approaches to noncovalent interactions: A comparison of dispersion corrections (DFT-D), exchange-hole dipole moment (XDM) theory, and specialized functionals. J. Chem. Phys. 28 February 2011; 134 (8): 084107. https://doi.org/10.1063/1.3545971
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