IGNOU MCH 11 2026 2027 - What are heterocarboranes? Which elements are involved in it? With sui

Question

What are heterocarboranes? Which elements are involved in it? With suitable equation give the
preparation of any one multidecker metal sandwich complexes.

13 Aug 2026

Answer :

Word Count : 434

Heterocarboranes are polyhedral borane–carborane cluster compounds in which one or more vertices of a conventional carborane framework are occupied by atoms other than boron and carbon. Carboranes themselves are polyhedral clusters containing boron, carbon and hydrogen, such as closo-C₂B₁₀H₁₂. When heteroatoms are incorporated into such cages, the resulting compounds are called heterocarboranes. The incorporation of heteroatoms modifies the electron count, geometry, stability, acidity and chemical reactivity of the cluster. The elements involved in heterocarboranes may include boron (B) and carbon (C) as the basic cage-forming elements, together with heteroatoms such as nitrogen (N), phosphorus (P), sulfur (S), silicon (Si), oxygen (O) and transition metals. When a metal atom occupies a position in the cage or is bonded to a carborane ligand, the compounds are often described as metallacarboranes. Transition metals such as Fe, Co, Ni, Cr, Mo, Ru and Rh are particularly important

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