E, Z

{
  "id": "MLC-T-CHM-003538",
  "term": "E, Z",
  "field": "Chemistry",
  "definition": "A system of nomenclature used to unambiguously assign the configuration of substituents around a double bond, particularly in alkenes. 'E' (entgegen, German for 'opposite') indicates that the higher-priority groups on each carbon of the double bond are on opposite sides. 'Z' (zusammen, German for 'together') indicates they are on the same side, based on Cahn-Ingold-Prelog priority rules.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "cis-trans isomers",
    "CIP priority",
    "alkenes",
    "bond order",
    "cumulenes",
    "stereodescriptor"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2206 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/e-z/"
}