Benzene-like molecules with bond-length alternation have also been synthesized without heteroatoms, such as the cyclohexatriene in Figure , which is a variant of starphenylene. Due to the peripheral antiaromatic four-membered ring moeities, there is bondlength alternation in the central benzene unit. In this cyclohexatriene there is practically no current that takes the short way, and a unidirectional ring current is thus generated (Figure ). However, the current is much lower than in the parent ortho-linked benzene due to quantum interferences features in the transmission close to the Fermi energy (Figure ), and consequently the magnetic field is still in the µT range.