Synthesis and structure of the first sulfur-donor adduct of a diruthenium tetracarboxylate |
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| Authors: | Heather J. GilfoyKatherine N. Robertson T.Stanley CameronManuel A.S. Aquino |
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| Affiliation: | a Department of Chemistry, St. Francis Xavier University, PO Box 5000, Antigonish, NS, Canada B2G 2W5
b Department of Chemistry, Dalhousie University, Halifax, NS, Canada B3H 4J3 |
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| Abstract: | The first sulfur-donor adduct of a diruthenium tetracarboxylate, [Ru2(μ-O2CCH3)4(THT)2]PF6 (1), where THT=tetrahydrothiophene, has been synthesized and characterized by X-ray diffraction, IR and UV-Vis spectroscopy, magnetic susceptibility and electrochemistry. Complex 1 displays a typical RuRu bond length of 2.285(4) Å but a very long RuS axial bond of 2.627(13) Å. The redox potential for the [Ru2(μ-O2CCH3)4(THT)2]+/0 couple is −322 mV (vs. Fc/Fc+) which is comparable to other moderately strong Lewis base adducts. Axial ligand binding is driven by σ-donation with little π-backdonation from the metal centers. |
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| Keywords: | Diruthenium carboxylate Crystal structures Sulfur-donor Electrochemistry |
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