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Issue 4, 1988
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Syntheses and structural studies of [2-(6-methyl)pyridyl]- and (8-quinolyl)trimethylsilylamido-lithium complexes

Abstract

Reactions of 6-methyl-2-trimethylsilyaminopyridine (Hmtmsap) with LiBun in hexane–diethyl ether, [LiBun(tmen)](tmen =N,N,N′,N′-tetramethylethylenediamine), or LiBun in hexane, yield, respectively, [{Li(OEt2)(mtmsap)}2](1), [Li(tmen)(mtmsap)](2), and [{Li(mtmsap)}2](3). Mixtures (5:2) of Hmtmsap and 2-amino-6-methylpyridine (Hamp) yield the complex molecule [Li7(mtmsap)5(amp)2](4). Corresponding compounds, prepared via metallation of 8-trimethylsilyl-aminoquinoline (Htmsaq), are [{Li(OEt2)(tmsaq)}2](5), [Li(tmen)(tmsaq)](6), and [{Li(tmsaq)}2](7). Compounds (1), (2), and (4)–(7) are crystalline and have been characterized by X-ray structure determination. Compounds (1) and (5) are dimeric with four-co-ordinate lithium centres, the amido-N bridging; (7) is based on the structure of (5), but with a gap in the metal co-ordination spheres where the ether ligands reside in (5). Compounds (2) and (6) are monomeric with four-co-ordinate metal centres, and (4) has seven different metal environments, each either three- or four-co-ordinate and with both bridging amido-N and pyridine-N centres.

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Article type: Paper
DOI: 10.1039/DT9880001011
Citation: J. Chem. Soc., Dalton Trans., 1988,0, 1011-1020
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    Syntheses and structural studies of [2-(6-methyl)pyridyl]- and (8-quinolyl)trimethylsilylamido-lithium complexes

    L. M. Engelhardt, G. E. Jacobsen, P. C. Junk, C. L. Raston, B. W. Skelton and A. H. White, J. Chem. Soc., Dalton Trans., 1988, 0, 1011
    DOI: 10.1039/DT9880001011

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