Diastereoisomer excess

{
  "id": "MLC-T-CHM-003134",
  "term": "Diastereoisomer excess",
  "field": "Chemistry",
  "definition": "A measure of the purity of a substance containing two diastereoisomers, expressed as the absolute difference between the mole fractions of the two diastereoisomers. This value indicates the extent to which one diastereoisomer predominates over the other in a mixture. It is calculated as the absolute difference between the mole fractions of the major and minor diastereoisomers.",
  "synonyms": [
    "diastereoisomeric excess"
  ],
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "diastereoisomerism",
    "enantiomeric excess",
    "mole",
    "stereoselectivity"
  ],
  "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/diastereoisomer-excess/"
}