[Me2AlBi(SiMe3)2]3—The First Structurally Characterized Organometallic Compound Containing a Bond between an Element of Group 13 and Bi

Dehydrosilylation of Bi(SiMe₃)₃ with Me₂AlH gave the title compound. This has a trimeric structure, the central unit of which is a six-membered Al₃Bi₃ ring (see structure). In agreement with the VSEPR model the angles are greater at the Al centers and smaller at the Bi centers.