Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/7446
Title: On the integration accuracy in molecular density functional theory calculations using Gaussian basis sets
Authors: MARTIN, Jan
Bauschlicher, C.W.
Ricca, A.
Issue Date: 2001
Publisher: ELSEVIER SCIENCE BV
Source: Computer physics communications, 133(2-3). p. 189-201
Abstract: The sensitivity of computed DFT (Density Functional Theory) molecular properties (including energetics, geometries, vibrational frequencies, and infrared intensities) to the radial and angular numerical integration grid meshes, as well as to the partitioning scheme, is discussed for a number of molecules using the Gaussian 98 program system. Problems with typical production grid sizes are particularly acute for third-row transition metal systems, but may still result in qualitatively incorrect results for a molecule as simple as CCH. Practical recommendations are made with respect to grid choices for the energy (+ gradient) steps, as well as for the solution of the CPKS (Coupled Perturbed Kohn-Sham) equations. (C) 2001 Elsevier Science B.V. All rights reserved.
Keywords: 2ND DERIVATIVES; ENERGY; EXCHANGE; APPROXIMATION; POTENTIALS
Document URI: http://hdl.handle.net/1942/7446
ISSN: 0010-4655
e-ISSN: 1879-2944
DOI: 10.1016/S0010-4655(00)00174-0
ISI #: 000166333100005
Category: A1
Type: Journal Contribution
Appears in Collections:Research publications

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