Cluster chemistry is the latest topic in Inorganic Chemistry. In chemistry, a cluster compound is considered as a compound with a triangular or larger closed polyhedron of metal atoms. Clusters exist in various stoichiometries and nuclearities. A cluster was referring to compounds containing metal–metal bonds. Clusters include: Atomic clusters , Molecular clusters, Transition metal carbonyl clusters, Transition metal halide clusters, Boron hydrides, Fe-S clusters in biology, Zintl clusters, Metalloid clusters, Catalysis by metal carbonyl clusters.
