Crown conformation

{
  "id": "MLC-T-CHM-002739",
  "term": "Crown conformation",
  "field": "Chemistry",
  "definition": "A conformation of a saturated ring with an even number of atoms, eight or more, in which the ring atoms lie alternately in two parallel planes and are all symmetry-equivalent, as in the D4d crown form of cyclooctane and the D5d form of cyclodecane. It is the larger-ring counterpart of the chair of cyclohexane. Cyclooctane itself prefers the boat-chair, because the crown form is strained by transannular hydrogen interactions.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "chair, boat, twist",
    "conformation",
    "tub conformation"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2205 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/crown-conformation/"
}