Molecular structure of [CpFe(CO)2]3In

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The molecular structure of [CpFe(CO)2]3In (Cp=η5−C5H5) has been determined and contains a planar, three-coordinate indium center bound to three CpFe(CO)2 moieties by unsupported In– Fe bonds. The orientation of the CpFe(CO)2 units relative to the Fe3In plane precludes π-type interaction between iron and indium, while comparison with the isostructural gallium analog suggests the orientation of the CpFe(CO)2 units is controlled by the size of the central atom and the inter-ligand steric repulsion. Crystal data: monoclinic, monoclinic, C2/c, a = 26.911(5), b = 10.838(2), c = 16.474(3)Å, β = 111.63(3)°, V = 4465(2)Å3 and, Z = 8.

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