Stickstoffverbindungen von Elementen der dritten Hauptgruppe mit intra- und intermolekularen Donor-Akzeptor-Bindungen, V [1]. Spezielle Gallium- und Indiumamide mit Alkoxogruppen / Nitrogen Compounds of Elements of the Third Main Group with Intra- and Intermolecular Donor Acceptor Bonds, V [1]. Special Gallium and Indium Amides with Alkoxo Groups

Abstract

The lithium alkoxoamidosilane (Me₂Si(O^tBu)(N^tBu)Li)₂ (4) and its trimethyltin derivative Me₂Si(O^tBu)(N^tBu)SnMe₃ (7) have been used, to introduce the ligand Me₂Si(O^tBu)(N^tBu) = L into molecular compounds of gallium and indium. The following molecules were synthesized: L-M(Me)Cl (M = Ga (5), In (6)), L-InMe₂ (8), L-InX₂ (X = Cl (9), Br (10)), L₂InX (X = Cl (11), Br (12)) and L₂Ga₂Cl₂ (22). The ligand L is assumed to chelate the metal atom on the basis of temperature dependent ¹H NMR spectra. The chelating effect is more pronounced in the gallium derivatives than in the indium analogues. Equilibria between L₂InX/InX₃ and LInX₂ have been observed in diethylether solutions. No metal(I) derivatives LGa or LIn could be isolated. L₂Ga₂Cl₂ (22), formally containing gallium(ll), can be sublimed without decomposition at 110 °C in vacuo.