Triruthenium methanol-coordinated

The reactions of methanol-coordinated triruthenium complex 2 with diimine ligands such as 2,2 -bipyridine and 1,10-phenanthroline at ambient temperature induced isolation of a series of oxo-centered triruthenium derivatives [Ru30(0Ac)s p.-T 1(C),T 2(N,N)-bipyridine (py)2]+ (bipyridine = dbbpy 31 dmbpy 32 bpy 33 Br2bpy 34 phen 35) containing an ort/zo-metallated bipyridine [8]. Formation of triruthenium derivatives 31-35 is involved in substitution of the coordinated methanol as well as one of the six bridging acetates in the precursor complex 2 by an orf/jo-metallated bipyridine in a p.-r 1(C),r 2(N,N) bonding fashion. 

From structural characterization of 48 by X-ray crystallography [31], it is suggested that formation of stable Ru 11,111- cluster derivative 47 or 48 is involved in substitution of the axially coordinated methanol as well as one of the six bridging acetates in the Ru ni ni precursor 2 by an abpy or abcp, in which formal oxidation state of the triruthenium species is converted from 111,111,111 to III,III,II. 

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