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Efficiency of numerical basis sets for predicting the binding energies of hydrogen bonded complexes: Evidence of small basis set superposition error compared to Gaussian basis sets

✍ Scribed by Yasuji Inada; Hideo Orita

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
362 KB
Volume
29
Category
Article
ISSN
0192-8651

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✦ Synopsis

Abstract

Binding energies of selected hydrogen bonded complexes have been calculated within the framework of density functional theory (DFT) method to discuss the efficiency of numerical basis sets implemented in the DFT code DMol^3^ in comparison with Gaussian basis sets. The corrections of basis set superposition error (BSSE) are evaluated by means of counterpoise method. Two kinds of different numerical basis sets in size are examined; the size of the one is comparable to Gaussian double zeta plus polarization function basis set (DNP), and that of the other is comparable to triple zeta plus double polarization functions basis set (TNDP). We have confirmed that the magnitudes of BSSE in these numerical basis sets are comparative to or smaller than those in Gaussian basis sets whose sizes are much larger than the corresponding numerical basis sets; the BSSE corrections in DNP are less than those in the Gaussian 6‐311+G(3df,2pd) basis set, and those in TNDP are comparable to those in the substantially large scale Gaussian basis set aug‐cc‐pVTZ. The differences in counterpoise corrected binding energies between calculated using DNP and calculated using aug‐cc‐pVTZ are less than 9 kJ/mol for all of the complexes studied in the present work. The present results have shown that the cost effectiveness in the numerical basis sets in DMol^3^ is superior to that in Gaussian basis sets in terms of accuracy per computational cost. © 2007 Wiley Periodicals, Inc. J Comput Chem, 2008

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