Au20(tBu3P)8: A Highly Symmetric Metalloid Gold Cluster in Oxidation State 0

Metalloid gold clusters have unique properties with respect to size and structure and are key intermediates in studying transitions between molecular compounds and the bulk phase of the respective metal. In the following, the synthesis of the all‐phosphine protected metalloid cluster Au20(tBu3P)8, s...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2022-09, Vol.61 (36), p.e202206019-n/a
Main Authors: Fetzer, Florian, Pollard, Nia, Michenfelder, Nadine C., Strienz, Markus, Unterreiner, Andreas N., Clayborne, Andre Z., Schnepf, Andreas
Format: Article
Language:English
Subjects:
Clusters
Gold
Intermediates
Jellium Model
Metalloid Cluster
Optical properties
Oxidation
Oxidation State
Phosphine
Phosphines
Structure
Valence
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Summary:Metalloid gold clusters have unique properties with respect to size and structure and are key intermediates in studying transitions between molecular compounds and the bulk phase of the respective metal. In the following, the synthesis of the all‐phosphine protected metalloid cluster Au20(tBu3P)8, solely built from gold atoms in the oxidation state of 0 is reported. Single‐crystal X‐ray analysis revealed a highly symmetric hollow cube‐octahedral arrangement of the gold atoms, resembling gold bulk structure. Quantum‐chemical calculations illustrated the cluster can be described as a 20‐electron superatom. Optical properties of the compound have shown molecular‐like behavior. A theoretically long‐studied Au20 cluster was synthesized by a wet chemistry approach, solely stabilized by phosphine ligands. The presented superatom cluster possesses a high symmetrical structure and an oxidation state of the gold atoms of ±0.
ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202206019