Envelope conformation

{
  "id": "MLC-T-CHM-003968",
  "term": "Envelope conformation",
  "field": "Chemistry",
  "definition": "A non-planar conformation adopted by five-membered rings, where four atoms lie in a common plane and the fifth atom is displaced from this plane. This puckering reduces torsional strain and angle strain within the ring. It is commonly observed in cyclopentane and furanose rings of carbohydrates.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "conformation"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2208 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/envelope-conformation/"
}