A general efficient implementation of the BSSE-free SCF and MP2 methods based on the chemical Hamiltonian approach
We describe some details related to a new, general, and efficient implementation of the BSSE‐free SCF and second‐order Møller–Plesset perturbation theories of intermolecular interactions, based on the “Chemical Hamiltonian Approach” (CHA). The program is applicable for both open‐shell and closed‐she...
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Published in | Journal of computational chemistry Vol. 27; no. 13; pp. 1505 - 1516 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
01.10.2006
Wiley Subscription Services, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | We describe some details related to a new, general, and efficient implementation of the BSSE‐free SCF and second‐order Møller–Plesset perturbation theories of intermolecular interactions, based on the “Chemical Hamiltonian Approach” (CHA). The program is applicable for both open‐shell and closed‐shell systems and for an arbitrary number of interacting subsystems. With the new program the CHA method is faster than the usual “counterpoise correction” scheme for single point calculations, especially for clusters consisting of several molecules. The numerical results provided by these conceptually different schemes, however, have again found to be very close to each other. The CHA scheme is particularly good for providing truly BSSE‐free MP2 data for intermolecular potentials. © 2006 Wiley Periodicals, Inc. J Comput Chem 27: 1505–1516, 2006 |
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Bibliography: | ark:/67375/WNG-7KW95LL2-F ArticleID:JCC20457 Spanish DGES - No. BQU2002-04112-C02-02 Hungarian Scientific Research Fund - No. OTKA T29716 Universitat de Girona istex:2FC9DD8A27FCC0FCB79610DE454280313F47F919 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0192-8651 1096-987X |
DOI: | 10.1002/jcc.20457 |