The term aromaticity in chemistry is reminiscent of symmetric, stable structures that have delocalized electrons and sustain diamagnetic ring currents in the presence of external magnetic fields. The two latter characteristics sometimes mistakenly are thought to be the same. In a groundbreaking discovery Liddle and co-workers synthesized a D3h complex with rare Th-Th bonds. Studying the electronic structure of a neutral singlet model system, 3", showed that the molecule has a delocalized HOMO between three Th atoms akin to a 2-electron 3-center bond.