Before discussing computational results, we describe the qualitative theoretical framework, and we focus on the triplet n,* state as this is more readily analysed computationally than the singlet n,* (vide infra). We foremost explore vertical triplet excitations because in the vertical n,* state the -component should, viewed simplistically (Figure ), remain as aromatic as in S0, while the -component with four -electrons should be antiaromatic. Factors that may perturb this description are (i) a difference in electrostatics within the -orbital frameworks of the S0 and n,* states as there will be an increased Coulomb repulsion in the -system due to the additional -electron in the n,* state, and (ii) a difference in the exchange interaction between the two states resulting from the change in the number of and -electrons. A residual that tends towards aromaticity of a vertically excited n,* state will result if there is a higher degree of aromaticity in the -component compared to the S0 state and/or a low degree of antiaromaticity in the -component. Similarly, a residual that tends toward antiaromaticity can stem from a lower aromaticity in the -component than in S0 and/or a high degree of antiaromaticity in the -component.