Synthesis and Characterization of Well-Defined Aluminum-Containing Heterobimetallic Selenides^†

A series of novel aluminum heterobimetallic selenides were reported. The reaction of LAl(SeH)₂ (1) with LiN(SiMe₃)₂ resulted in the formation of [LAl(SeLi)₂(THF)₂] (2) (L = HC(CMeNAr)₂, Ar = 2,6-iPr₂C₆H₃). Compound 2 reacted with Me₂GeCl₂, Ph₂GeCl₂, Cp₂TiCl₂, and Cp₂ZrCl₂, respectively, to produce LAl(μ-Se)₂GeMe₂ (3), LAl(μ-Se)₂GePh₂ (4), LAl(μ-Se)₂TiCp₂ (5), and LAl(μ-Se)₂ZrCp₂ (6) in moderate yields. Compounds 2−6 were characterized by elemental analysis, NMR, and electron impact-MS. The X-ray single-crystal structure of 3 is reported and confirms the spirocyclic arrangement of the aluminum atom within the six-membered AlN₂C₃ and four-membered AlSe₂Ge rings.