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In connection with the discussion of aromaticity/antiaromaticity,maps of the current density induced by a magnetic field directed along the normal to the molecular plane were computed with the ipsocentric coupled-Hartree-Fock CTOCD-DZ method (6-311+G* basis) for the two closed-shell species B6 and B62- held at the optimum geometry of the monoanion (RB3LYP, same basis). The Exeter implementation of the SYSMO program was used. Combination of orbital contributionsdefined by the ipsocentric method allows deduction of the sense of the ring current in the open-shell species B6-.
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