In addition to this, we also report the ∆G for substitutions made on the para-phenyl position of the reference catalyst in Table of the SI. We select a set of 8 substituents for which the electronic effects span from electron withdrawing to electron donating effect. Compared to the reference catalyst, we do not see a significant shift in the ∆G values with the introduction of these groups into the catalyst. However, we note that electron donating groups are slightly more favorable for the dehydrogenation reactions compared to electron withdrawing groups.