A Convergent Approach for the Generation of Dendrimers Containing the ­[Ru3O(CH3COO)6] Electroactive Core

We report on a convergent approach for the generation of dendrimers containing the [Ru3O(ac)6] electroactive core, of great interest as multielectron transfer catalysts. The proposed strategy is based on the generation of the trimeric complex [{Ru3O(ac)6(4-pic)2(pz)}2-μ2-Ru3O(ac)6(CH3OH)]3+ (ac = acetate, 4-pic = 4-methylpyridine, pz = pyrazine). In this complex, the labile CH3OH ligand can be displaced by the bridging pyrazine ligand of [Ru3O(ac)6(pz)3]0, leading to the self-assembly of the [{[Ru3O(ac)6(4-pic)2(pz)]2-μ2-Ru3O(ac)6(pz)}3-μ3-Ru3O(ac)6]n+ dendrimer containing 30 ruthenium atoms.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)