Electrocyclic reaction

{
  "id": "MLC-T-CHM-003667",
  "term": "Electrocyclic reaction",
  "field": "Chemistry",
  "definition": "A type of pericyclic reaction involving the formation of a new sigma bond between the termini of a conjugated pi system, or the reverse process. This reaction occurs through a concerted mechanism, where bond breaking and bond formation happen simultaneously in a cyclic transition state. The stereochemistry of the product is determined by the number of pi electrons and whether the reaction is thermally or photochemically induced.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "conjugated system",
    "molecular rearrangement",
    "pericyclic reaction",
    "antarafacial"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1108 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/electrocyclic-reaction/"
}