Monomeric tri-coordinated bis(ferrocenyl)haloalumanes

Abstract

The reactions of the sterically demanding ferrocenyl lithium dimer (Fc*Li)₂ (Fc* = 2,5-bis(3,5-di-t-butyl-phenyl)-1-ferrocenyl) with aluminum trihalides (AlCl₃, AlBr₃, and AlI₃) to furnish the corresponding monomeric bis(ferrocenyl)haloalumanes are reported. In the case of the reaction with AlI₃, an unexpected intramolecular 1,1′-aluminum migration in the ferrocenyl moiety was found to occur. Their monomeric structures with a tri-coordinated aluminum atom show affinitive Al⋯Fe interactions.