{[Si(SiMe<sub>3</sub>)<sub>3</sub>]<sub>2</sub>Ge<sub>9</sub>‑SiMe<sub>2</sub>‑(C<sub>6</sub>H<sub>4</sub>)‑SiMe<sub>2</sub>‑Ge<sub>9</sub>[Si(SiMe<sub>3</sub>)<sub>3</sub>]<sub>2</sub>K}<sup>−</sup>: The Connection of\nMetalloid Clusters via an Organic Linker
Oleksandr Kysliak (1565527)Claudio Schrenk (1565533)Andreas Schnepf (1565530)
Abstract
The reaction of [(Hyp)<sub>2</sub>Ge<sub>9</sub>]<sup>2–</sup> (Hyp = Si(SiMe<sub>3</sub>)<sub>3</sub>) with ClSiMe<sub>2</sub>-C<sub>6</sub>H<sub>4</sub>-SiMe<sub>2</sub>Cl gives [K(THF)][(Hyp)<sub>2</sub>Ge<sub>9</sub>-SiMe<sub>2</sub>-C<sub>6</sub>H<sub>4</sub>-SiMe<sub>2</sub>-Ge<sub>9</sub>(Hyp)<sub>2</sub>K] <b>K1</b> in 45% yield in the form of orange-red\ncrystals. <b>1</b> is thereby the first compound where two Ge<sub>9</sub>(Hyp)<sub>2</sub> clusters are bound together via a bridging\nligand. <b>1</b> is stable in solution but cannot be transferred\nintact into the gas phase via electrospray ionization indicating a\nhigher reactivity with respect to other metalloid Ge<sub>9</sub>R<sub>3</sub> clusters. The arrangement of the nine germanium atoms within\nthe two Ge<sub>9</sub> units in <b>1</b> is unique for metalloid\nGe<sub>9</sub>R<sub>3</sub> clusters. Quantum chemical calculations\nfurther reveal an electronic interaction of the two Ge<sub>9</sub> units in <b>1</b> via the bridging phenylene group.
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