Read the following paper on water exchange for [Ir(H2O)6]3+: Cusanelli, A. et al. J. Am. Chem. Soc. 1996, 118, 5265. Answer the following questions. a. How do the authors follow the rate of water exchange? b. What are the values for the entropy and volume of activation (ΔS‡ and ΔV‡, respectively) at 298 K? Why are these values inconsistent with a dissociative mechanism (either D or Id)? c. How do the authors distinguish between possible Ia and A mechanisms for water exchange at Ir(III)? d. What is the authors’ explanation for the faster water exchange by the deprotonated [Ir(H2O)5(OH)]2+?