Homotopic

{
  "id": "MLC-T-CHM-005387",
  "term": "Homotopic",
  "field": "Chemistry",
  "definition": "Describing atoms or groups of a molecule that are interchanged by a proper rotation axis, C2, C3 or higher, so that replacing either one gives identical compounds. Homotopic groups are equivalent under all conditions, including in a chiral environment. The three chlorines of chloroform, interchanged by a C3 axis, are homotopic, whereas the two methylene hydrogens of ethanol are enantiotopic.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "chiral",
    "prochirality"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2210 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/homotopic/"
}