pro-R, pro-S

{
  "id": "MLC-T-CHM-009558",
  "term": "pro-R, pro-S",
  "field": "Chemistry",
  "definition": "Stereodescriptors used to distinguish between two identical ligands on a prochiral center, typically a carbon atom, that if replaced by a different group, would lead to an R or S configuration, respectively. These designations are assigned according to the Cahn-Ingold-Prelog priority rules. For instance, in ethanol (CH3CH2OH), the two hydrogen atoms on the methylene carbon are pro-R and pro-S.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "CIP priority",
    "chiral",
    "prochirality",
    "prochirality centre",
    "stereodescriptor",
    "stereoheterotopic"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2214 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/pro-r-pro-s/"
}