While most are content with internal conversion sitting in the domain of the harmonic approximation, Hoche and coworkers found instead that under the assumption of the energy gap law, internal conversion should be expected to drop exponentially with respect to the emission energy. However, this is not observed in the merocyanine 4-(dicyanomethylene)-2-tert-butyl-6-[3-(3-butyl-benzothiazol-2-ylidene)1-propenyl]-4H-pyran chromophore. Instead, a drop is observed as the emission energy decreases due to solvatochromic effects. While it is possible that this could be due to some degree of molecular complexation, resulting in a solute-solvent superstructure locking in or perturbing important transition participating modes, they postulate the possibility of internal conversion to a conical intersection, which could lead back to the reactant well, or to the formation of a photoproduct.