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Six novel μ-oxamido heterobinuclear complexes, namely Cu(oxae)Ln(Me2bpy)2-(ClO4)3 (Ln=La, Nd, Gd, Tb, Ho, Er), where oxae denotes N, N’-bis(2-aminoethyl)oxamido dian-ion, Me2bpy is 4,4’-dimethyl-2,2’-bipyridyl, have been synthesized and characterized by elemental analyses, IR, conductivity measurements and electronic spectra. The temperature dependence of the magnetic susceptibility of Cu(oxae)Gd(Me2bpy)2(ClO4)3 has been meaured over the range 4-300 K. The least-squares fit of the experimental susceptibilities yielded J - 1.87 cm-1.The observed Gd(Ⅲ)-Cu(Ⅱ) coupling is ferromagnetic. One plausible mechanism that can cause a ferromagnetic coupling between Gd(Ⅲ) and Cu(Ⅱ) is discussed in terms of spin-polarization.
Six novel μ-oxamido heterobinuclear complexes, namely Cu (oxae) Ln (Me2bpy) 2- (ClO4) 3 (Ln = La, Nd, Gd, Tb, Ho, Er) -aminoethyl) oxamido dian-ion, Me2bpy is 4,4’-dimethyl-2,2’-bipyridyl, have been synthesized and characterized by elemental analyzes, IR, conductivity measurements and electronic spectra. The temperature dependence of the magnetic susceptibility of Cu (oxa) Gd (Me2bpy) 2 (ClO4) 3 has been meaured over the range 4-300 K. The least-squares fit of the experimental susceptibilities yielded J - 1.87 cm-1.The observed Gd (III) -Cu One plausible mechanism that can cause a ferromagnetic coupling between Gd (III) and Cu (II) is discussed in terms of spin-polarization.