The extent of aromaticity in the S0 state of many heteroaromatics has already been reported. The compounds now investigated in their n,* states (Figure ) are grouped so as to allow us to explore the effects of heteroatom electronegativity, the number of heteroatoms, and their relative positions. We focus on six-membered ring (6-MR) heterocycles as we find that 5-MR heteroaromatics (e.g., furan and imidazole) always have n,* states of high energies placed well above their first * states, making them difficult to observe experimentally. Hence, the latter species are only discussed in the Supporting Information (SI, section 3.7).