Bredt's rule

{
  "id": "MLC-T-CHM-001491",
  "term": "Bredt's rule",
  "field": "Chemistry",
  "definition": "A chemical rule stating that a double bond cannot be placed at the bridgehead position of a bridged bicyclic system if a small ring would be formed. This is due to the severe angle strain and unfavorable geometry that would result. The rule applies to rings with fewer than eight atoms in the bridge.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "bridge",
    "strain",
    "transient species"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1077 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/bredt-s-rule/"
}