Umsetzungen von Ga2Br4 · 2 Dioxan mit (Trimethylsilyl)methyllithium und Neopentyllithium – Synthese und Kristallstruktur von Lithiumtetraalkylgallanaten(III) mit Li–C–Ga‐Brücke

Reactions of Ga2Br4 · 2 Dioxane with (Trimethylsilyl)methyllithium and Neopentyllithium — Synthesis and Molecular Structure of Lithium Tetraalkylgallanates(III) with Li–C–Ga Bridges Ga2Br4 · 2 dioxane reacts with (trimethylsilyl)methyllithium or neopentyllithium to yield in n‐pentane/diethyl ether solution besides elemental gallium exclusively the disproportionation product trialkylgallane. In pure n‐pentane the dioxane adducts of the corresponding lithium tetraalkylgallantes (R = CH2SiMe3 2; R = CH2CMe3 4) are formed. 2 and 4 are also synthesized by the reaction of GaBr3 with alkyl lithium in the molar ratio 1:4. The crystal structure of 2 shows a dioxane‐bridged dimer and Li–C–Ga bridges with lithium probably bound by the C–H s̀‐bonds of the central carbon atoms.