Enforced concerted mechanism

{
  "id": "MLC-T-CHM-003935",
  "term": "Enforced concerted mechanism",
  "field": "Chemistry",
  "definition": "A concerted reaction mechanism that proceeds through a single transition state because any potential stepwise pathway involving an intermediate is energetically inaccessible. The reaction is forced to be concerted as the intermediate that would be formed in a stepwise process is of such high energy that it cannot be formed under the reaction conditions. This contrasts with a non-enforced concerted reaction, where a stepwise path is possible but energetically less favorable.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "More O'Ferrall-Jencks diagram",
    "lifetime",
    "transition state"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1112 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/enforced-concerted-mechanism/"
}