Hammond principle

{
  "id": "MLC-T-CHM-005088",
  "term": "Hammond principle",
  "field": "Chemistry",
  "definition": "A postulate in physical organic chemistry stating that the transition state of a reaction resembles the species (reactant or product) to which it is closer in energy. For an exothermic reaction, the transition state resembles the reactants, while for an endothermic reaction, it resembles the products. This principle provides insight into the structure and energy of transition states.",
  "synonyms": [
    "Hammond postulate",
    "Leffler's assumption"
  ],
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "More O'Ferrall-Jencks diagram",
    "stable",
    "transition state",
    "unstable"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1119 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/hammond-principle/"
}