Synthesis and structural studies of an (8-quinolyl)amido-lithium complex and its reaction with dimethylsilicone

Journal Publication ResearchOnline@JCU
Jones, Cameron;Junk, Peter C.;Smithies, Neil A.
Peter Junk
Abstract

Treatment of 8-aminoquinoline (AQH₂) with ⁿBuLi in diethyl ether affords {[(AQH)₂]Li₂(OEt₂)}₂ (1). Compound 1 reacts with dimethylsilicone to yield the lithiated SiMe2-bridged complex, {[(AQ)₂SiMe₂]Li₂(OEt₂)}₂ (2). Compound 2 has also been synthesised by treating 1 with dichlorodimethylsilane affording {[(AQH)₂SiMe₂] (3), followed by dilithiation. All complexes were characterised by spectroscopic and X-ray crystallographic methods. The X-ray structure of 1 reveals a tetranuclear centrosymmetric dimeric structure with a Li4N4 step-ladder arrangement. Compound 2 is tetranuclear with an eight-membered Li₄N₄ ring with ligands straddling Li atoms at opposing corners of the ring. Compound 3 has a SiMe₂ group bridging two 8-amidoquinoline functionalities.

Journal

Journal of Organometallic Chemistry

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Volume

607

ISBN/ISSN

1872-8561

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Issue

1-2

Pages Count

7

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Publisher

Elsevier

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DOI

10.1016/S0022-328X(00)00237-0