Thus, even though most of the compounds are common heterocycles, we included species that allow us to identify general trends. We focus on heteroaromatics with n,* states among the lowest few excited states, whereby they are photochemically relevant. Yet, the n,* states are not necessarily T1 and S1 for all compounds as that allows us to reveal trends. As far as we know, no investigation into which heteroaromatics have n,* states as their lowest excited states and which ones have * states has earlier been reported. Thus, the main objectives of our study is to resolve which heteroaromatics have n,* states as their lowest excited states and which ones have * states as these states, and to what extent (anti)aromaticity plays a role for this.