Issue 17, 2017

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

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

Supplementary files

Article information

Article type
Paper
Submitted
29 11 2016
Accepted
11 1 2017
First published
30 1 2017

Dalton Trans., 2017,46, 5625-5630

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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