Deuterium isotope effect in octahedral substitutions. Part II. The basic hydrolysis of chlorohydroxo-, chloronitro-, and dichloro-bis(ethylenediamine)cobalt(III) cations
The combined effect produced by deuterations of solvent, nucleophile, and complex on the kinetics of basic hydrolysis of cis- and trans-[Co en2 A Cl]+ cations in aqueous solutions has been studied where A = OH, NO2, and Cl and en represents ethylenediamine. The rates in the deuterated systems are lower than those in the corresponding protiated systems, and comparison with results obtained in Part I supports the idea that both solvolytic aquation and basic hydrolysis of octahedral cobalt(III) complexes are mechanistically similar, although the extent of bond-breaking in the transition state for the two types of reactions may be different.