The reaction of Al(O-i-Pr)3 with the SalenH2 ligand: An unexpected product

The reaction of Al(O-i-Pr)3 with the SalenH2 ligand (2-(HO)C6H4CHNCH2CH2NCHC6H42-(OH), (1)) gave a new unexpected binuclear aluminum complex, [(Salen)Al]2(μ-Salen) (2). Complex 2 was characterized in solution by multinuclear NMR spectroscopy (including 27Al NMR) and in the solid state by X-ray analysis. The aluminum atoms in 2 possess a distorted octahedral coordination environment.

An unusual binuclear aluminum complex (2) in which two [(Salen)Al] fragments are connected by a bridging Salen ligand was obtained. The structure of 2 was investigated in solution and in the solid state by various physical methods. It is established that the structure of the ligand determines the metal nuclearity of complex formed.Figure optionsDownload as PowerPoint slide