Dimethyl and diphenyl formamide complexes of lanthanide perchlorates

Abstract

N,N-Dimethyl formamide (DMF) and N,N-diphenyl formamide (DPF) complexes of six lanthanide perchlorates of the composition M(DMF)8(ClO4)3 and M(DPF)6(ClO4)3 where M = La, Ce, Pr, Nd, Sm, or Y have been prepared and characterized. The infrared spectra show that the amide is bonded to the metal through oxygen. Conductivity, molecular weight, and spectral studies indicate coordination numbers of eight and six for DMF and DPF complexes respectively, with the perchlorate groups remaining ionic.