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

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(C 6 H 4 Br) 3 ][SbCl 6 ] to a Ce(IV) chloride complex, which reacted with t BuONa to form a Ce(IV) tert -butoxide complex, one displaying a reduction potential cathodically shifted relative to that of Ce(IV) chloride complex.