 A versatile method involves the attachment of Cp*Ru+ to preformed sandwich complexes.Monomeric double-decker and multidecker sandwiches have been used as building blocks for extended systems, some of which exhibit electron delocalization between metal centers.An example of a cyclic poly(metallacarborane) complex is the octahedral "carbon-wired" system shown below, which contains a planar C16B8 macrocycle.