The crystallographic observation of molecular lithium oxide: synthesis and solid-state structure of [Me2AlN(2-C5H4N)Ph]2(O)Li2·2THF

David R. Armstrong; Robert P. Davies; David J. Linton; Ronald Snaith (the late); Paul Schooler; Andrew E. H. Wheatley

doi:10.1039/B104388A

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The crystallographic observation of molecular lithium oxide: synthesis and solid-state structure of [Me₂AlN(2-C₅H₄N)Ph]₂(O)Li₂·2THF†

David R. Armstrong,^a Robert P. Davies,^b David J. Linton,^c Ronald Snaith (the late),^c Paul Schooler^c and Andrew E. H. Wheatley*^c

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* Corresponding authors

^a Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, UK

^b Department of Chemistry, Imperial College of Science, Technology and Medicine, Exhibition Road, London, UK

^c Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK

Abstract

The reaction of Me₂Al[N(2-C₅H₄N)Ph], 1, with 1 equiv. (Me₃Si)₂NLi affords the lithium aluminate Me₂Al[N(SiMe₃)₂][N(2-C₅H₄N)Ph]Li, 2, which exhibits solvent dependent reactivity towards oxygen. In toluene 2 appears to resist oxygenation but in the presence of THF it reacts to afford the new complex [Me₂AlN(2-C₅H₄N)Ph]₂(O)Li₂·2THF, 3. X-Ray diffraction data reveal that 3 has a butterfly-type Al₂Li₂ bimetallic core with two equivalents of reformed 1 stabilising discrete, molecular lithium oxide. The structures of 1–3 are probed theoretically.

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Article information

DOI: https://doi.org/10.1039/B104388A
Article type: Paper
Submitted: 18 May 2001
Accepted: 24 Jul 2001
First published: 10 Sep 2001

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J. Chem. Soc., Dalton Trans., 2001, 2838-2843

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The crystallographic observation of molecular lithium oxide: synthesis and solid-state structure of [Me₂AlN(2-C₅H₄N)Ph]₂(O)Li₂·2THF

D. R. Armstrong, R. P. Davies, D. J. Linton, R. Snaith (the late), P. Schooler and A. E. H. Wheatley, J. Chem. Soc., Dalton Trans., 2001, 2838 DOI: 10.1039/B104388A

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Journal of the Chemical Society, Dalton Transactions