Cooperative Ge–N Bond Activation in Hydrogallation Products of Alkynyl(diethylamino)germanes (Et<sub>2</sub>N)<sub><i>n</i></sub>Ge(C≡C<sup><i>t</i></sup>Bu)<sub>4–<i>n</i></sub>
Treatment of the alkynyl(diethylamino)germanes Et2NGe(C≡CtBu)3 (1) and (Et2N)2Ge(C≡CtBu)2 (2) with dialkylelement hydrides tBu2MH (M = Al, Ga) afforded in high yields the hydrometalation products (tBuC≡C)2(Et2N)Ge[C(MtBu2)═C(H)tBu] (3), (tBuC≡C)(Et2N)Ge[C(MtBu2)═C(H)tBu]2 (4) and (tBuC≡C)(Et2N)2Ge[C(GatBu2)═C(H)tBu] (6). The Lewis acidic aluminum and gallium atoms showed a close contact to the nitrogen