Cluster chemistry: XXIII. Mono-, di- and tri-auration of H4Ru4(CO)12 with [{Au(PPh3)}3O][BF4]: X-ray crystal structure of HRu4Au3(CO)12(PPh3)3 |
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| Authors: | Michael I Bruce Brian K Nicholson |
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| Institution: | Jordan Laboratories, Department of Physical and Inorganic Chemistry, University of Adelaide, South Australia, 5001 Australia |
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| Abstract: | Reactions between H3Ru4(CO)12]? and {Au(PPh3)}3O]+ afford H3Ru4-Au(CO)12(PPh3), H2Ru4Au2(CO)12(PPh3)2 and HRu4Au3(CO)12(PPh3)3. The X-ray structure of the latter shows that it has the unusual bicapped trigonal bipyramidal metal core, in which two Ru2Au faces of the Ru4Au fragment are capped by the other two Au atoms. The central Au atom is asymmetrically attached to the Ru3 face as a result of the interaction of a phenyl ring of the PPh3 ligand with two of the CO groups. Metal-metal separations are: two Au-Au, 2.837(1) Å; Ru-Ru, six between 2.805–3.004(3) Å; Au-Ru, seven between 2.821–3.007(2) Å. HRu4Au3(CO)12(PPh3)3 is monoclinic, space group P21/n, with a 18.754(3), b 18.459(5), c 22.317(4) Å, β 113.06(2)°; 2852 data I > 2.5σ(I)] were refined to R, Rw 0.038, 0.038. |
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