For the structural extent of the polyhedral molecular chemistry of boron to rival that of the organic chemistry of the carbon hydrides, (a) the individual boron-containing polyhedra need to be fused together to make larger contiguous covalent assemblies, and (b) an intermolecular chemistry needs to be developed. Contemporary examples are given that illustrate novel chemistry in both these areas and that may point the way to some future developments.

One-step derivatization of the laser borane, anti-B₁₈H₂₂, with pyridine gives three uniquely structured macropolyhedral boranes with interesting photophysical properties.