Abstract
A new dinuclear ruthenium(II) catecholato complex [Cp*Ru(κ 2:η 6-μ 2-1,2-O 2C 6H 4)RuCp*] ( 3; Cp* = η 5-C 5Me 5) has been prepared by the reaction of [Cp*RuCl] 4 with 2 equiv. of disodium catecholate in THF. Complex 3 has a dinuclear structure, in which one of the Cp*Ru fragments is κ 2-bonded to the two oxygen atoms and the other is η 6-bonded to the aromatic ring. Similar treatment of [Cp*RuCl] 4 with disodium 2,3-naphthalenediolate affords an analogous κ 2:η 6-bonded dinuclear complex [Cp*Ru(κ 2:η 6-μ 2-2,3-O 2C 10H 6)RuCp*] ( 4) with selective π-complexation at the oxygen-substituted naphthalene ring. The molecular structure of 4 has been determined by X-ray crystallography. The oxygen-bound ruthenium atoms in complexes 3 and 4 are coordinatively unsaturated and readily uptake 1 equiv. of carbon monoxide to give the corresponding carbonyl adducts [Cp*Ru(CO)(κ 2:η 6-μ 2-1,2-O 2C 6H 4)RuCp*] ( 5) and [Cp*Ru(CO)(κ 2:η 6-μ 2-2,3-O 2C 10H 6)RuCp*] ( 6), respectively.
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