Comment on “Theoretical studies on the ground states in [M(terpyridine)2]2+ and [M(4-(4-(t-butyl)phenyl)terpyridine)2]2+ (M = Fe, Ru, Os) and excited states in [Ru(terpyridine)2]2+ using density functional theory”

The nature of the first excited state of [Fe(terpyridine)2]2+ has been reinvestigated. In contrast to previous findings, it is metal-to-ligand charge transfer in nature, thus fitting in the series of the Ru and Os complexes.