SYNTHESIS AND CHARACTERIZATION OF NOVEL HETERONUCLEAR COMPLEXES OF LN(III)-CU(II) WITH NONCYCLIC POLYETHER SCHIFF-BASE

Nine novel heteronuclear complexes of Ln(III)-Cu(II) with salicylidene tetraethylene glycol diamine (SALTTA) have been synthesized and chara cterized. They have the general formulae [LnCu(2)(SALTTA)(2)(NO3)(3)]( NO3)(4).3H2O (Ln=La, Pr, Nd, Sm) and [LnCu(3)(SALTTA)(3)(NO3)(5)]- (NO 3)(4).4H(2)O (Ln=Gd, Tb, Er, Yb, Y). The Ill spectra show that v(C=N) in the Ln(III)-Cn(II) heteronuclear complexes are splitted up into two peaks with a far distance. It has been confirmed that oxygen atoms in oxyethylene of the ligand are not all coordinated to the central meta l ions by both IR and NMR methods.