Basis set superposition error

{
  "id": "MLC-T-CHM-001134",
  "term": "Basis set superposition error",
  "field": "Chemistry",
  "definition": "An artifact that arises in quantum chemical calculations of interaction energies between two or more molecules when using incomplete basis sets. It occurs because each monomer effectively borrows basis functions from its partner, leading to an artificial stabilization of the complex. This error is typically corrected using the counterpoise method.",
  "subject": "Chemistry and Human Health",
  "references": [
    "PAC, 2016, 88, 239. 'Glossary of terms used in computational drug design, part II (IUPAC Recommendations 2015)' on page 241 (https://doi.org/10.1515/pac-2012-1204)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/basis-set-superposition-error/"
}