κ

{
  "id": "MLC-T-CHM-006295",
  "term": "κ",
  "field": "Chemistry",
  "definition": "A prefix symbol in coordination nomenclature, the kappa convention, that marks the individual donor atoms through which a ligand attaches to a central atom, written before the element symbol of each donor atom. A right superscript gives the number of such attachments, so κ2P in a diphosphine name means two phosphorus atoms are bound. It differs from η, which denotes bonding through contiguous atoms (hapticity).",
  "synonyms": [
    "kappa"
  ],
  "see_also": [
    "coordination",
    "ligands"
  ],
  "references": [
    "Red Book, 3rd ed., p. 174"
  ],
  "url": "https://mlchart.com/terminology/chemistry/k-term/"
}