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Issue 17, 2017
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Mixing Li and Cs in the reduction of corannulene for the assembly of a cesium-capped sandwich with a hexanuclear heterometallic core

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Abstract

The use of two alkali metals having the greatest ion size mismatch, Li and Cs, in the reduction of bowl-shaped corannulene (C20H10, 1), results in the preparation of a heterobimetallic organometallic self-assembly, [Cs(diglyme)]2//[Li3Cs3(C20H10)2(diglyme)2] (2). The X-ray crystallographic investigation of 2 revealed the formation of a triple-decker sandwich having a highly-charged hexanuclear core, (Li3Cs3)6+, held between two tetrareduced corannulene decks. The sandwich is capped by external cesium ions filling the concave cavities of corannulene bowls. The average depth of two C20H104− anions of 0.754(14) Å is significantly greater in 2 compared to the values of 0.241(2)–0.355(2) Å observed in the homometallic lithium sandwiches formed by tetrareduced corannulene, thus illustrating the unique flexibility of its carbon framework to adapt to different internal and external coordination environments.

Graphical abstract: Mixing Li and Cs in the reduction of corannulene for the assembly of a cesium-capped sandwich with a hexanuclear heterometallic core

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Publication details

The article was received on 29 Nov 2016, accepted on 11 Jan 2017 and first published on 30 Jan 2017


Article type: Paper
DOI: 10.1039/C6DT04521A
Citation: Dalton Trans., 2017,46, 5625-5630
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    Mixing Li and Cs in the reduction of corannulene for the assembly of a cesium-capped sandwich with a hexanuclear heterometallic core

    S. N. Spisak, Z. Wei and M. A. Petrukhina, Dalton Trans., 2017, 46, 5625
    DOI: 10.1039/C6DT04521A

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