Tub conformation

{
  "id": "MLC-T-CHM-012337",
  "term": "Tub conformation",
  "field": "Chemistry",
  "definition": "A non-planar form of an eight-membered ring, seen in cyclooctatetraene, that resembles a shallow tub with D2d symmetry. Two opposite ring bonds and the atoms at their ends define a plane, and the remaining four atoms are raised above that plane on one side. It is the eight-membered analogue of the boat form of cyclohexane.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "conformation",
    "crown conformation"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2221 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/tub-conformation/"
}