Fig. 1

Molecules exhibiting Möbius topology. a Comparison of theoretical models for Hückel and Möbius aromaticity (applied to the example of cyclooctatetraene). b Herges and co-workers prepared a polyene-derived compound that has been regarded as the first isolated Möbius aromatic macrocycle. c Catenane 1 consisting of Möbius-conjugated nanohoops, with its X-ray crystal structure shown with 30%-probability ellipsoids. Hydrogen atoms and solvent molecules are omitted for clarity