Kinetic studies carried out on the isomerization of monosubstituted alkenes 61 and 5-phenyl-1pentene (15a) using the Co-bipyridine system (Conditions A) and the cycloisomerization of 30 using the Co(salen)-1 system (Conditions B) revealed intriguing differences between the two cases (Figure ). For Conditions B, the reaction exhibits first order kinetics in both [substrate] and [Co(salen)-1], while for Conditions A, the reaction is zero order in both substrate and Co-bipyridine concentrations. The reaction rate under Conditions A is not influenced by current, while under Conditions B, the rate increases proportionally with increasing current. Neither case is influenced by the concentration of the proton source. Neither system requires 1F/mol substrate reacted (dashed gray line in left and center plots in Figure ), and thus both are catalytic in current. Turnover in the cycloisomerization reaction using Co(salen)-1 continues, albeit more slowly, even after the current is stopped (right plot in Figure ). Reactions using co-bipyridine do not proceed further when current is stopped.