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Polarization counterpoise corrections to correlated hydrogen bond interaction energies
Author(s) -
Loushin Sharilyn K.,
Dykstra Clifford E.
Publication year - 1987
Publication title -
journal of computational chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.907
H-Index - 188
eISSN - 1096-987X
pISSN - 0192-8651
DOI - 10.1002/jcc.540080110
Subject(s) - counterpoise , superposition principle , polarization (electrochemistry) , basis set , chemistry , electronic correlation , molecule , basis (linear algebra) , atomic physics , attraction , computational chemistry , statistical physics , physics , molecular physics , quantum mechanics , mathematics , linguistics , geometry , philosophy
Basis set superposition error in hydrogen‐bonded systems can exaggerate attraction calculated from self‐consistent field energies as well as from electron correlation energies. One cause of this error is the basis set deficiency in describing the charge polarization of one constituent molecule when its bonding partner approaches. That constituent molecule's description is improved partly because of the proximity of the partner's basis functions, independent of real attraction. That polarization‐related error is shown to occur primarily at the SCF level and not at correlated levels.