253195-49-2Relevant academic research and scientific papers
Synthesis of Organoaluminum Chalcogenides [RAl(μ-E)]2 (R = N(SiMe3)C(Ph)C(SiMe3)2, E = Se, Te) from Aluminum Dihydride [RAlH(μ-H)]2
Cui, Chunming,Roesky, Herbert W.,Noltemeyer, Mathias,Schmidt, Hans-Georg
, p. 5120 - 5123 (1999)
1-Azaallylaluminum dihydride [RAlH(μ-H)]2 (1) (R = N(SiMe3)C(Ph)C(SiMe3)2) has been prepared in nearly quantitative yield from the reduction of RAlBr2 with an excess of LiAlH4 in diethyl ether. Reaction of 1 with elemental Se or Te in toluene afforded the novel organoaluminum chalcogenide [RAl(μ-E)]2 (E = Se (2); Te (3)) in good yield. The structures of compounds 1, 2, and 3 in the solid state have been characterized by X-ray diffraction analyses. Compounds 2 and 3 have a dimeric structure featuring three novel fused planar four-membered ring systems with a central Al2E2 core. Based on 1H and 29Si NMR data and crystal structural analysis of 2 and 3, an equilibrium of the trans and cis isomers in solution is proposed for the two compounds due to the relative orientation of the two chelating rings of the bidentate R ligands.
