Transition state theory

{
  "id": "MLC-T-CHM-012240",
  "term": "Transition state theory",
  "field": "Chemistry",
  "definition": "A theoretical framework used to calculate reaction rates by assuming that a quasi-equilibrium exists between reactants and an activated complex, or transition state. This theory posits that the rate of reaction is determined by the rate at which the activated complex crosses the potential energy barrier. It provides a conceptual basis for understanding activation energies.",
  "synonyms": [
    "conventional transition-state theory"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "Boltzmann constant",
    "Gibbs energy of activation",
    "Planck constant",
    "activated complex",
    "elementary reaction",
    "enthalpy",
    "enthalpy of activation",
    "entropy",
    "entropy of activation",
    "equilibrium constant",
    "potential-energy profile",
    "probability",
    "order of reaction",
    "reaction coordinate"
  ],
  "references": [
    "PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 190 (https://doi.org/10.1351/pac199668010149)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/transition-state-theory/"
}