Lambda

{
  "id": "MLC-T-CHM-006424",
  "term": "Lambda",
  "field": "Chemistry",
  "definition": "A convention used in organic nomenclature to denote the bonding number of a main group element when it deviates from its standard valence. It is represented by the Greek letter lambda followed by a superscript number indicating the bonding number. For example, lambda-5-phosphane indicates a phosphorus atom with five bonds.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "bonding number",
    "parent hydride",
    "valence"
  ],
  "references": [
    "PAC, 1984, 56, 769. 'Treatment of variable valence in organic nomenclature (lambda convention) (Recommendations 1983)' on page 774 (https://doi.org/10.1351/pac198456060769)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/lambda/"
}