Large transition metal clusters, 2. Synthesis and properties of Rh55[P(tert-Bu)3]12Cl20 |
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| Authors: | Günter Schmid Ursula Giebel Wilfried Huster Andreas Schwenk |
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| Affiliation: | Institut für Anorganische Chemie der Universität Essen, D-4300 Essen 1, F.R.G;Physikalisches Institut der Universität Tübingen, D-7400 Tübingen 1, F.R.G. |
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| Abstract: | The reaction of a mixture of [(tert-Bu)3P]2Rh(H2)Cl and [(tert-Bu)3P]2Rh(CO)Cl with gaseous diborane in benzene solutions at 50–60°C leads to a cluster whose formula is assumed to be Rh55[P(tert-Bu)3]12Cl20, due to analytical, spectroscopic, and chemical results. The number 55 is one of the ‘magic numbers’ of full shell cuboctahedrons or icosahedrons. 31P, and 103Rh N.M.R. investigations assign a high mobility either of the ligands or of the rhodium atoms or of both.The coordinatively unsaturated surface of the cluster whose structure is supposed to be cuboctahedral, allows gaseous carbon monoxide to be adsorbed irreversibly, even if the cluster is in the solid state. The CO groups are coordinated exclusively in a terminal manner. |
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| Keywords: | Author to whom correspondence should be addressed. |
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