Abstract
The so-called “superposition error” is investigated for different Gaussian basis sets used in the SCF calculations of the interaction energy between neon atoms. The results show that unless the counterpoise method [1] is applied, a qualitatively wrong description of interaction can be obtained. This is observed even for the basis sets which give fairly accurate atomic energies. It is shown that, despite large super-position error, basis sets fitted to the exact density [2] can provide very reasonable results if the counterpoise method is applied.
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This work was partly supported by the Polish Academy of Sciences within the project MR-I.9.
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Bulski, M., Chałasiński, G. On basis set effects in SCF calculations of the interaction energy between closed-shell atoms. Theoret. Chim. Acta 44, 399–404 (1977). https://doi.org/10.1007/BF00547832
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DOI: https://doi.org/10.1007/BF00547832