Closo-

{
  "id": "MLC-T-CHM-012983",
  "term": "Closo-",
  "field": "Chemistry",
  "definition": "A prefix used in inorganic nomenclature to denote a closed polyhedral cluster of atoms, particularly in boron hydrides and related compounds. In a closo-structure, all vertices of the polyhedron are occupied by atoms, forming a completely enclosed cage. This structural motif is common in borane anions like B6H6^2-.",
  "subject": "Inorganic Chemistry",
  "see_also": [
    "cage compound"
  ],
  "references": [
    "Blue Book, p. 464 (https://www.acdlabs.com/iupac/nomenclature/)",
    "PAC, 1972, 30, 681. 'Nomenclature of Inorganic Boron Compounds' on page 686 (https://doi.org/10.1351/pac197230030681)",
    "Red Book, 3rd ed., p. 245"
  ],
  "url": "https://mlchart.com/terminology/chemistry/closo/"
}