A wide variety of organic and inorganic compounds show π-aromaticity, yet for all-metal systems it has remained restricted to compounds with three to five atoms. Now, the anionic cluster [Th@Bi12]4− has been shown to exhibit π-aromaticity, with a significant ring current despite relying on the delocalization of only two π-electrons.
- Armin R. Eulenstein
- Yannick J. Franzke
- Stefanie Dehnen