Finally, we evaluated electronic aromaticity indices, specifically AV1245 and AVmin, which were developed for assessing antiaromaticity in large cyclic π-conjugated systems such as porphyrinoids. Recent studies have suggested AVmin as the most reliable electronic indicator for antiaromaticity. Both indices identified 1e and 1c as having the highest and lowest antiaromaticity, respectively, which is consistent with our conclusions based on other indicators. The AVmin values, in particular, showed perfect agreement with the order established by the NICS and GIMIC calculations. The AV1245 values were also in agreement, except for those of compounds 1a, 1b, and 1f, which had similar values.