Lithium-dimethylamino-hydrido-aluminate: Lösungszustand in Diethylether, Tetrahydrofuran und Dimethyldiglykolether / Lithium Dimethylamino Hydrido Aluminates: The Solution State in Diethylether, Tetrahydrofuran and Dimethyldiglycol Ether

Abstract

<jats:title>Abstract</jats:title><jats:p> The reaction of LiAlH<jats:sub>4</jats:sub> with dimethylamine has been studied in THF, diglyme and diethyl ether solution covering the molar ratios 1:0.5 to 1:4. In all cases the stoichiometric amount of H<jats:sub>2 </jats:sub>s evolved. With the exception of LiAl[N(CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>]<jats:sub>4</jats:sub> all other members of the series LiAlH<jats:sub>4-n</jats:sub>[N(CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>]<jats:sub>n</jats:sub> cannot be isolated. They are in equilibrium with one another in solution, these equilibria are independent of the solvent used. </jats:p><jats:p>The structure of compound LiAl[N(CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>]<jats:sub>4</jats:sub> · 2(OC<jats:sub>4</jats:sub>H<jats:sub>8</jats:sub>) has been determined by X-ray diffraction. The anion acts as a bidentate ligand to Li which is also bonded to the oxygen atoms of two THF molecules. </jats:p>