T. Matsubara, P. Ford
May 1, 1976
Citations
0
Influential Citations
67
Citations
Journal
Inorganic Chemistry
Abstract
Received December 2, 1975 AIC508623 Formal reduction potentials (Ef) obtained by cyclic voltammetry in aqueous solution are reported for a series of pentaammineruthenium(II1) complexes, Ru(NH3)5L3+, and several tetraammine complexes Ru(NH~)&~+, where L is a substituted pyridine (py-X) or an organonitrile (R-CN). The nitrile complexes display more positive Ef values than do the pyridine complexes with n-unsaturated R groups giving the largest values. Among the pyridine complexes, electron-withdrawing substituents -X increase Ef, and this trend is attributed to a combination of Tand u-bonding effects. The CV technique is also used to measure the rates of hydration and dehydration of the carbonyl group of N-coordinated 4pyridinecarboxaldehyde and it is demonstrated that coordination to R u ( N H ~ ) ~ ~ + slows the acid-catalyzed hydration path by several orders of magnitude.