Gauche

{
  "id": "MLC-T-CHM-004780",
  "term": "Gauche",
  "field": "Chemistry",
  "definition": "A conformational arrangement in a molecule where two substituents on adjacent atoms are separated by a torsion angle of approximately ±60 degrees. This conformation is distinct from anti (180 degrees) and syn-periplanar (0 degrees) arrangements. In butane, the gauche conformation is less stable than the anti conformation due to steric hindrance.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "torsion angle"
  ],
  "references": [
    "Blue Book, p. 484 (https://www.acdlabs.com/iupac/nomenclature/)",
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2209 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/gauche/"
}