The frontier molecular orbitals of cumulenes can be more helical than those of polyynes, 124 while typically also having higher current. Odd-n [n]cumulenes, n being the number of cumulated double bonds, have co-planar end-groups and high currents. However, its frontier orbitals are not helical but regular π-orbitals. Consequently, the ring currents in [5]cumulene are weak (Figure ), and the magnetic fields is not unidirectional but runs around the molecule as in the polyyne with co-planar end-groups (Figure ). Still, this magnetic field approaches the mT range in the center of the molecule due to the relatively high current.