A trinuclear bis(dioximate)(chloro)(nitrosyl)ruthenium(II) complex containing two (2,2 '-bipyridine)copper(II) groups

A trinuclear bis(cyclohexanedioximate)(chloro)(nitrosyl)ruthenium(II) compl ex containing two (2,2'-bipyridine)-copper(II) groups has been synthesized and its electronic and electrochemical properties investigated. According t o ZINDO/S calculations, the electronic structure of the ruthenium(dioximate )(nitrosyl) moiety is strongly delocalized. The electrochemical behavior ha s been interpreted with the aid of spectroelectrochemical measurements. In the trinuclear complex, it has been shown that the copper(II) ions can prom ote the oxidation of the NO species generated electrochemically, and also m ediate the redox reactions of the complex, under a dioxygen atmosphere.