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- Title
All-Metal Antiaromaticity in Sb<sub>4</sub>-Type Lanthanocene Anions.
- Authors
Min, Xue; Popov, Ivan A.; Pan, Fu‐Xing; Li, Lei‐Jiao; Matito, Eduard; Sun, Zhong‐Ming; Wang, Lai‐Sheng; Boldyrev, Alexander I.
- Abstract
Antiaromaticity, as introduced in 1965, usually refers to monocyclic systems with 4 n π electrons. This concept was extended to all-metal molecules after the observation of Li3Al4− in the gas phase. However, the solid-phase counterparts have not been documented to date. Herein, we describe a series of all-metal antiaromatic anions, [Ln( η4-Sb4)3]3−(Ln=La, Y, Ho, Er, Lu), which were isolated as the K([2.2.2]crypt) salts and identified by single-crystal X-ray diffraction. Based on the results obtained from the chemical bonding analysis, multicenter indices, and the electron-counting rule, we conclude that the core [Ln( η4-Sb4)3]3− fragment of the crystal has three locally π-antiaromatic Sb4 fragments. This complex represents the first locally π-antiaromatic all-metal system in the solid state, which is stabilized by interactions of the three π-antiaromatic units with the central metal atom.
- Subjects
ANTIAROMATICITY; ELECTRONS; CHEMICAL bonds; CRYSTALS; ANIONS
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 18, p5621
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201600706