Collision complex

{
  "id": "MLC-T-CHM-002219",
  "term": "Collision complex",
  "field": "Chemistry",
  "definition": "A transient species formed when two or more molecules collide and remain in close proximity for a short period, allowing for energy transfer or chemical reaction. This complex exists for a duration longer than a typical molecular vibration but shorter than a stable intermediate. It is a precursor to product formation in many gas-phase reactions.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "encounter complex"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2233 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/collision-complex/"
}