If an enhanced unidirectional magnetic field is to be achieved, the molecule must behave like a coil (or solenoid). When the current moves in a circular or helical path through the molecule, the magnetic field will be enhanced in the center of the ring current in accordance with the righthand rule (Figure ). For example, molecular systems based on benzene rings have been suggested to have strong ring currents in the molecular electronics literature. However, studies of the magnetic fields that arise from such currents are sparse. Still, studies of magnetoresistance and spin filtering effects, such as the chirality-induced spin selectivity (CISS) effect, suggest that magnetic fields may lo-Figure : a) Ballistic current density and the resulting magnetic field computed for an anilineterminated diyne. Current density cutoff is 5% of max current density; magnetic field cutoff is 20% of the maximum field strength. b) Schematic depiction of the linear current and circular magnetic field of the diyne as predicted by the right-hand rule. c) Schematic depiction of the circular ring current in a meta-connected benzene and the resulting enhanced unidirectional magnetic field as predicted by the righthand rule. cally be strong.