Fig. 6: Compound 3.
From: Neutral 4π-electron tetrasilacyclobutadiene contains unusual features of a Möbius-type aromatic ring

The plot of the highest-lying molecular orbitals of 3 and schematic drawing of the Möbius-type aromaticity.
From: Neutral 4π-electron tetrasilacyclobutadiene contains unusual features of a Möbius-type aromatic ring
The plot of the highest-lying molecular orbitals of 3 and schematic drawing of the Möbius-type aromaticity.