{Sn<sub>9</sub>[Si(SiMe<sub>3</sub>)<sub>3</sub>]<sub>2</sub>}<sup>2‑</sup>: A Metalloid\nTin Cluster Compound With\na Sn<sub>9</sub> Core of Oxidation State Zero
Claudio Schrenk (1565533)Florian Winter (2058112)Rainer Pöttgen (1635109)Andreas Schnepf (1565530)
Abstract
The disproportionation reaction of the subvalent metastable\nhalide\nSnCl proved to be a powerful synthetic method for the synthesis of\nmetalloid cluster compounds of tin. Now we present the synthesis and\nstructural characterization of the anionic metalloid cluster compound\n[Sn<sub>9</sub>[Si(SiMe<sub>3</sub>)<sub>3</sub>]<sub>2</sub>]<sup>2‑</sup> <b>3</b> where the oxidation state of the tin\natoms is zero. Quantum chemical calculations as well as Mössbauer\nspectroscopic investigations show that three different kinds of tin\natoms are present within the cluster core. Compound <b>3</b> is highly reactive as shown by NMR investigations, thus being a\ngood starting material for further ongoing research on the reactivity\nof such partly shielded metalloid cluster compounds.
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