Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 9, Pages 3216-3219Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201510831
Keywords
clathrates; germanium; metalloid clusters; quantum-chemical calculations; solid-state structures
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Funding
- Deutsche Forschungsgemeinschaft (DFG)
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The oxidation of [Ge-9(Hyp)(3)](-) (Hyp=Si(SiMe3)(3)) with an Fe-II salt leads to Ge-18(Hyp)(6) (1), the largest Group14 metalloid cluster that has been structurally characterized to date. The arrangement of the 18 germanium atoms in 1 shows similarities to that found in the solid-state structure Ge(cF136). Furthermore, 1 can be described as a macropolyhedral cluster of two Ge-9 units. Quantum-chemical calculations further hint at a strained arrangement so that 1 can be considered as a first trapped intermediate on the way from Ge-9 units to elemental germanium with the clathrate-II structure (Ge(cF136)).
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