The trend in MICD results (Figure ) resembles that of the electronic indices, but the values are markedly offset towards antiaromaticity since the -components give strong paratropic influences. As an illustration, Figure displays the spin-separated -electron MICD maps of the S0 and 3 n,* states of 1, as well as the orbital transition scheme which provides a qualitative rationalization. In S0, the π-electrons of all monoheteroaromatics induce diatropic currents due to translational transitions between the occupied b1 and a2 orbitals and the unoccupied b1 and a2 orbitals (blue arrows, Figure ). Analogous transitions are found within the -electron stack of the 3 n,* state, giving diatropic current contributions. However, the -electrons induce strongly paratropic currents arising from the rotational transition from the highest occupied b1 orbital (the -SOMO) to the empty a2 orbital (red arrow). Although the -SOMO-1 (a2) and -SOMO-2 (b1) contribute to diatropic currents through translational transitions to the unoccupied a2 orbital, these contributions are small in comparison to the paratropic current contributions.