The induced ring currents of (homo)aromatic systems by an external magnetic field were probed computationally as a measure for the homoaromaticity of 15 and 18. In conjunction with (indirect) experimentally determined diatropicity via 1 H NMR spectroscopy for the adjacent hydrogen atoms, magnetic indices can be used to theoretically correlating the degree of aromaticity. Two such magnetic indices that are widely used are nucleus independent chemical shifts (NICS) and the anisotropy of the induced ring current density (ACID) , which were calculated for 15 and 18 (Fig. and Supplementary Discussion Section 1.7).