Despite the similarities between the theoretical predictions in Fig. and the experimental observations in Fig. , a number of significant differences must be noted. Firstly, these theories suggest that κ is most strongly suppressed when the cavity frequency, ω c , is close to the barrier frequency, ω ‡ . This is in contrast to what the experiments suggest (such as in Fig. ), where the chemical rate is strongly suppressed when photon frequency is close to the reactant well frequency.