Computational study of bonding trends in the metalloactinyl series EThM and MThM′ (E = N−, O, F+; M, M′ = Ir−, Pt, Au+)

In the well-known thorium dioxide molecule, oxygen can be replaced by platinum. A new isoelectronic series of 'metalloactinyls' is predicted. The bond distances can be both above or below triple-bond ones.