Figure 1. Photochemical isophorone deconjugation at various concentrations of acetic acid:[isophorone]= 0.145 M. many aspects of the mechanisms of these photochemical reactions remain controversial. In particular, the details of the mechanism of the deconjugation reaction are confused. For example, it has been reported that photochemical deconjugation unaccountably fails for the corresponding 3-ethyl-and 3-isopropyl-2-cyclo- ...