Inverse coordination chemistry: oxocarbons, other polyoxo carbocyclic molecules and oxygen heterocycles as coordination centers. Topology and systematization

This review presents inverse coordination complexes (i.e.metal compounds displaying an arrangement of acceptor and donor sites opposite to that occurring in conventional coordination complexes) built around polyoxo carbocyclic molecules as coordination centers. The review illustrates the molecular topologies of metal complexes with rhodizonato, croconato, squarato, deltato anions, as well as benzene di- and polyolates, dioxane and crown ethers as centroligand cores.