Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 37, Pages 12908-12913Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201907127
Keywords
cobalt; intermetalloid cluster; Raman studies; ruthenium; tin
Categories
Funding
- Deutsche Forschungsgemeinschaft
- TUM.solar
- TUM graduate school
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Endohedral clusters count as molecular models for intermetallic compounds-a class of compounds in which bonding principles are scarcely understood. Herein we report soluble cluster anions with the highest charges on a single cluster to date. The clusters reflect the close analogy between intermetalloid clusters and corresponding coordination polyhedra in intermetallic compounds. We now establish Raman spectroscopy as a reliable probe to assign for the first time the presence of discrete, endohedrally filled clusters in intermetallic phases. The ternary precursor alloys with nominal compositions K5Co1.2Ge9 and K4Ru3Sn7 exhibit characteristic bonding modes originating from metal atoms in the center of polyhedral clusters, thus revealing that filled clusters are present in these alloys. We report also on the structural characterization of [Co@Ge-9](5-) (1a) and [Ru@Sn-9](6-) (2a) obtained from solutions of the respective alloys.
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