Dyotropic rearrangement

{
  "id": "MLC-T-CHM-013053",
  "term": "Dyotropic rearrangement",
  "field": "Chemistry",
  "definition": "A pericyclic reaction in which two sigma bonds migrate simultaneously and intramolecularly, in one concerted step without a catalyst. In type I the two migrating groups exchange positions on neighboring atoms, whereas in type II each group moves to a new site without any exchange. The trans-diaxial interchange of two bromine atoms on adjacent carbons of a steroid ring is a type I example.",
  "subject": "Organic and Biomolecular Chemistry",
  "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/dyotropic-rearrangement/"
}