Abstract
We have investigated the coordination behavior of the acetate ion in aqueous rare earth chloride (LnCl_3; Ln^<3+>=La^<3+>-Lu^<3+>) solutions in the glassy state by a Raman spectroscopy. The series behavior of the symmetric Raman Ln-OH_2 stretching band (v_w) for the [Ln(H_2O)_n]^<3+> complex and the Raman C-C stretching band (vcc) for the acetate ions is discussed in conjunction with the coordination number change in the middle of the series. It is concluded that the Ln^<3+>-acetate complex changes from a polymeric chain structure to a bidentate ligand.
