Overlap integral

{
  "id": "MLC-T-CHM-008380",
  "term": "Overlap integral",
  "field": "Chemistry",
  "definition": "A mathematical integral that quantifies the extent to which two atomic or molecular orbitals occupy the same region of space. It is a measure of the spatial overlap between two wave functions. A non-zero overlap integral is a prerequisite for the formation of a chemical bond between two atoms.",
  "subject": "Physical and Biophysical Chemistry",
  "references": [
    "Green Book, 2nd ed., p. 17 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/overlap-integral/"
}