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Issue 26, 2012
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First structural evidence for multiple alkali metals between sandwich decks in a metallocene

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Abstract

A tetralithio salt (1) derived by treating 1,4-bis(trimethylsilyl)-cyclooctatriene with nBuLi serves as the first structural evidence for a multi-alkali metallocene. Single-crystal XRD confirms two Li+ each asymmetrically bind to η3 and η4 between two COT′′ rings and two Li+ terminally bind to η3. Solid-state NMR studies confirm the presence of two distinct lithium ion sites while the solution NMR studies suggest the formation of an (COT′′ dianion) ion-pair in solution. Further treating of the tetralithio salt with NaCl leads to linear sodium polymeric chains. Therefore, simply changing the ionic radius changes the molecular structure.

Graphical abstract: First structural evidence for multiple alkali metals between sandwich decks in a metallocene

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Publication details

The article was received on 21 Jan 2012, accepted on 27 Feb 2012 and first published on 28 Feb 2012


Article type: Paper
DOI: 10.1039/C2DT30164D
Citation: Dalton Trans., 2012,41, 8060-8066
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    First structural evidence for multiple alkali metals between sandwich decks in a metallocene

    M. Jeletic, F. A. Perras, S. I. Gorelsky, J. J. Le Roy, I. Korobkov, D. L. Bryce and M. Murugesu, Dalton Trans., 2012, 41, 8060
    DOI: 10.1039/C2DT30164D

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