Tripodal tris(siloxide) ligand supported trivalent rare-earth metal complexes and redox reactivity

Abstract

Tripodal tris(siloxide) ligand supported rare-earth metal complexes LLn(III) (Ln = Ce, Pr, Tb, Y, Lu) were synthesized. The Ce(III) complex was oxidized with [N(C₆H₄Br)₃][SbCl₆] to a Ce(IV) chloride complex, which reacted with ^tBuONa to form a Ce(IV) tert-butoxide complex, one displaying a reduction potential cathodically shifted relative to that of Ce(IV) chloride complex.