Molecularity

{
  "id": "MLC-T-CHM-007526",
  "term": "Molecularity",
  "field": "Chemistry",
  "definition": "The number of reactant molecules or atoms that participate in a single elementary step of a chemical reaction. It can be unimolecular (one molecule), bimolecular (two molecules), or termolecular (three molecules). Molecularity is a theoretical concept derived from the reaction mechanism, unlike the order of reaction which is determined experimentally.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "chemical reaction",
    "elementary reaction",
    "medium",
    "molecular entity",
    "order of reaction",
    "solvation"
  ],
  "references": [
    "PAC, 1993, 65, 2291. 'Nomenclature of kinetic methods of analysis (IUPAC Recommendations 1993)' on page 2296 (https://doi.org/10.1351/pac199365102291)",
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1143 (https://doi.org/10.1351/pac199466051077)",
    "PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 175 (https://doi.org/10.1351/pac199668010149)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/molecularity/"
}