Some literature reports have shown the existence of short Hg(II)···d8[M] (M = Pd, Pt) contacts between linear Hg(II) and square planar d8[M] complexes that have been defined as heterometallophilic interactions. Linear L–Hg(II)–L complexes exhibit a π-hole or positive belt of electrostatic potential at the Hg atom, while late transition metals can serve as effective electron donors through their filled dz2 orbitals. This study provides compelling evidence that Hg(II)···d8[M] interactions should be more appropriately termed Spodium bonds.