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An Air-Stable Heterobimetallic Si2M2 Tetrahedral Cluster |
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| Authors: | Gizem Dübek Franziska Hanusch Dr Dominik Munz Prof Shigeyoshi Inoue |
| Institution: | 1. Department of Chemistry, Catalysis Research Center and Institute of Silicon Chemistry, Technical University Munich, Lichtenbergstraße 4, 85748 Garching bei München, Germany;2. Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, General and Inorganic Chemistry, Egerlandstraße 1, 91058 Erlangen, Germany |
| Abstract: | Air- and moisture-stable heterobimetallic tetrahedral clusters Cp(CO)2MSiR]2 (M=Mo or W; R=SitBu3) were isolated from the reaction of N-heterocyclic carbene (NHC) stabilized silyl(silylidene) metal complexes Cp(CO)2M=Si(SitBu3)NHC with a mild Lewis acid (BPh3). Alternatively, treatment of the NHC-stabilized silylidene complex Cp(CO)2W=Si(SitBu3)NHC with stronger Lewis acids such as AlCl3 or B(C6F5)3 resulted in the reversible coordination of the Lewis acid to one of the carbonyl ligands. Computational investigations revealed that the dimerization of the intermediate metal silylidyne (M≡Si) complex to a tetrahedral cluster instead of a planar four-membered ring is due to steric bulk. |
| Keywords: | Cluster-Verbindungen Silicium Silylidene Silylidine Tetrahedrane |