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- Title
Peculiar All-Metal σ-Aromaticity of the [Au<sub>2</sub>Sb<sub>16</sub>]<sup>4−</sup> Anion in the Solid State.
- Authors
Popov, Ivan A.; Pan, Fu‐Xing; You, Xue‐Rui; Li, Lei‐Jiao; Matito, Eduard; Liu, Chao; Zhai, Hua‐Jin; Sun, Zhong‐Ming; Boldyrev, Alexander I.
- Abstract
Gas-phase clusters are deemed to be σ-aromatic when they satisfy the 4 n+2 rule of aromaticity for delocalized σ electrons and fulfill other requirements known for aromatic systems. While the range of n values was shown to be quite broad when applied to short-lived clusters found in molecular-beam experiments, stability of all-metal cluster-like fragments isolated in condensed phase was previously shown to be mainly ascribed to two electrons ( n=0). In this work, the applicability of this concept is extended towards solid-state compounds by demonstrating a unique example of a storable compound, which was isolated as a stable [K([2.2.2]crypt)]+ salt, featuring a [Au2Sb16]4− cluster core possessing two all-metal aromatic AuSb4 fragments with six delocalized σ electrons each ( n=1). This discovery pushes the boundaries of the original idea of Kekulé and firmly establishes the usefulness of the σ-aromaticity concept as a general idea for both small clusters and solid-state compounds.
- Subjects
GAS phase reactions; AROMATICITY; MOLECULAR beams; ELECTRONS; MOLECULAR structure
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 49, p15570
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201609497