Kinetics of ternary complex formation between manganese(II) species and 2,2′-bipyridine

Abstract

The temperature-jump relaxation method has been used to measure rate constants and activation parameters for formation and dissociation of a 1:1 complex between manganese(II) and 2,2′-bipyridine (bipy) and of ternary complexes between bipy and ten substituted manganese species. The results are discussed in terms of the normal dissociative model and the possibility is considered that ring closure is contributing to the rate-determining step. The results confirm the previous indication that the first ligand generally has comparatively little influence on the kinetics of the reaction between manganese(II) and the second ligand.