Strukturen zweifach metallierter Derivate von 3, 3-Dimethyl-1, 5-bis(trimethylsilyl)-1, 5-diaza-pentan mit Lithium und Aluminium sowie zweier Donor-substituierter Digallane
The diaminopropane derivative Me2C[CH2N(H)SiMe3](2) is metallated with n-butyllithium and lithium tetrahydridoaluminate to obtain Me2C[CH2N(Li)SiMe3](2) and Me2C[CH2N(Li)SiMe3][CH2N(AlH2)SiMe3], respectively. Both compounds exhibit a central eight-membered ring, Li4N4 or Li2Al2N4. Me2C[CH2N(Li)-SiMe3](2) reacts with Ga2Cl4 (.) 2dioxane under formation of the corresponding tetra(amino)digallane. This is monomeric, in contrast to a dimeric tetraalkoxy-substituted digallane, (Ga4OBudelta)-Bu-t. All compounds were characterized by single crystal X-ray crystallography.