ChemInform Abstract: Directed Metal Oxidation Levels in Azo-Ruthenium Cyclometalates. Synthesis and Structure of a Trivalent Family.
Abstract
Substituted azobenzenes (I) or (IV) react with (II) to give complexes in which the metal oxidation state is directed by the donor groups -OH or -O-Me and -S-Me, respectively, leading to trivalent or bivalent Ru complexes.
ChemInform Abstract
Substituted azobenzenes (I) or (IV) react with (II) to give complexes in which the metal oxidation state is directed by the donor groups -OH or -O-Me and -S-Me, respectively, leading to trivalent or bivalent Ru complexes. In the case of (VI) the reaction product is a mixture, which is separated by chromatography on alumina. (III) and (VII) are the first examples of mononuclear cyclometalated Ru(III), (IIIc) is characterized by a crystal structure determination (space group P21/c, Z=4). (III) and (VII) are stable and can be electrochemically converted to unstable Ru(IV) and Ru(II) congeners. The compounds (V) can only be oxidized to the Ru(III) state.
