Cluster chemistry: XVI. Synthesis and crystal structure of AuFe3(μ3-HCNBut)(CO)9(PPh3), an AuFe3 butterfly cluster |
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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, Adelaide, South Australia, 5001 Australia |
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Abstract: | The reaction between AuCl(PPh3 and Fe(μ3-HCNBut)(CO)9]? gives AuFe3(μ3-HCNBut)(CO)9(PPh3), crystals of which are triclinic, space group P, with a 12.815(3), b 16.265(4), c 19.106(3) Å, α 67.15(3), β 73.46(2), γ 73.12(2)° and Z = 4. The comlex contains an AuFe3 “butterfly” cluster, the Fe3 face of which is bridged by the HCNBut ligand bonded in the (2σ + π) mode on the side opposite to the Au(PPh3) moiety, which, contrary to expectation based on the analogy with H, bridges the two Fe atoms σ-bonded to N, and π-bonded to the CN group. The AuFe2/Fe3 dihedral angles in the two independent molecules differ significantly, with values of 110.9 and 132.1°. |
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