Hypo-electronic triple-decker sandwich complexes: synthesis and structural characterization of [(Cp*Mo)2{μ–η6:η6-B4H4E-Ru(CO)3}] (E = S, Se, Te or Ru(CO)3 and Cp* = η5-C5Me5)

Electron-poor triple-decker complexes, [(Cp*Mo)₂{μ–η⁶:η⁶-B₄H₄ERu(CO)₃}] (E = S, Se, Te, Ru(CO)₃) with hexagonal bridging ring composed of boron, ruthenium and chalcogen atoms.