Abstract
The reaction of Bu 4Li 4 with 4 molar equivalents of 1-(dimethylamino)naphthalene in diethyl ether affords novel 8-(dimethylamino)-1-naphthyllithium. Its molecular structure (X-ray) consists of two 8-(dimethylamino)-1-naphthyl groups each 3 center-2 electron bonded via C(1) to two lithium atoms and via the nitrogen lone pair to one of these lithium atoms. Diethyl ether coordination completes the pseudo tetrahedral lithium coordination sphere. Variable temperature 7Li and 1H NMR spectroscopy reveals an equilibrium between the [8-Me 2NC 10H 6Li·OEt 2] 2 species and the ether-free [8-Me 2NC 10H 6Li] n . A tetranuclear structure is proposed for the latter species.
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