Δ, Λ

{
  "id": "MLC-T-CHM-002848",
  "term": "Δ, Λ",
  "field": "Chemistry",
  "definition": "Stereodescriptors used to specify the helicity of chiral coordination compounds, particularly those with octahedral geometry. The Δ (delta) descriptor indicates a right-handed screw sense, while the Λ (lambda) descriptor indicates a left-handed screw sense, based on the arrangement of chelate rings or ligands around the central metal atom. These symbols are analogous to the P and M descriptors used for molecular helicity.",
  "synonyms": [
    "delta, lambda"
  ],
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "helicity",
    "stereoisomers"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2205 (https://doi.org/10.1351/pac199668122193)",
    "Red Book, 3rd ed., p. 184"
  ],
  "url": "https://mlchart.com/terminology/chemistry/d-l/"
}