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Novel Main Group-Transition Metal Cluster Compounds Incorporating Antimony, Iron and Cobalt

Gröer, Thomas and Palm, Tobias and Scheer, Manfred (2000) Novel Main Group-Transition Metal Cluster Compounds Incorporating Antimony, Iron and Cobalt. European Journal of Inorganic Chemistry 2000 (12), pp. 2591-2595.

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Abstract

The reaction of [ ${Cpx(CO)2Fe}$ SbCl2] [1a: Cpx = 5-C5H3tBu2-1,3 (Cp"); 1b: Cpx = 5-C5Me5 (Cp*)] with Na2[Fe(CO)4] or K[Co(CO)4] affords the novel antimony-transition metal cluster compounds [ ${3-SbFe(CO)2Cp"}$ 3 ${Fe(CO)3}$ 4] (2), [ ${Fe3(CO)9}{3-SbFe(CO)2Cp"}$ 2] (3) and [ ${4-SbFe(CO)2Cp*}$ 2 ${Co4(CO)10(-CO)}$ ] (4). All products were characterised by X-ray structure analyses and other methods. Cluster 2 reveals a novel Sb3Fe4 core, which does not follow the Wade-Mingos rules. Cluster 3 forms a square-pyramidal nido-cluster. The Sb2Co4 cluster core of 4 derives from a pentagonal bipyramid and consists of apical Sb and equatorial Co atoms with one missing pentagonal core atom.