As we have seen, the two sets of parameters lead to two different relaxation mechanisms, intimately connected to the character of the lowest-excited states originated from the different range-separation parameters. Using set A pro-duces low-lying MLCT states, which leads to long-lived triplet states, while set B leads to dynamics dominated by re-population of a hot S * 0 state through the singlet manifold as well as the diabatic S 0 state via the triplet manifold, both via states involving MC character. The obvious question now is, which of the two models describes the behavior of [Fe(cpmp) 2 ] 2+ correctly? In order to solve this problem, we leverage transient absorption spectroscopy (TAS).