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Basis Set Superposition Errors Are Partly Basis Set Imbalances
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DOI：10.1021/acs.jctc.3c01156.png)
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摘要
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When calculating fragment interaction energies by electronic structure methods employing medium-sized atom-centered basis sets, it is often observed that the effect is systematically overestimated. The common interpretation is that the systematic error arises because the basis set for the complex is more complete than for the isolated fragments, and this is denoted basis set superposition errors. It has been observed, however, that the interaction energy in some cases is underestimated, which defies the interpretation in terms of basis set completeness, and instead suggests that the effect partly is due to basis set imbalance. The imbalance can be removed by explicit optimization of the basis sets for each structure, and it is shown that this to a significant extent reduces the systematic overestimation attributed to basis set superposition error.
Keyword:
GAUSSIAN-BASIS SETS
AB-INITIO
COUNTERPOISE CORRECTION
ENERGIES
DISPERSION
期刊
IF:
5.5
论文数:
1.1W
被引数:
5.4W
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