N,N′-双(2-氨基丙基).草酰胺合铜(Ⅱ)的铜(Ⅱ)-锰Ⅱ配合物的合成和磁性

Synthesis and Magnetism of Copper (Ⅱ)-Manganese (Ⅱ) Complexes with N, N'-Bis (2-aminopropyl) oxamidocopper(Ⅱ)

合成和表征了两种新的异双核配合物[Cu(oxap)Mn(L)_2](ClO_4)_2,oxap表示N,N'-双(2-氨基丙基)草酰胺根阴离子,L表示1,10-邻菲喀啉(phen)和5-硝基-1,10-邻菲咯啉(NO_2-phen)。测定了配合物的变温磁化率(4.2—300K),并用最小二乘法和从自旋Hamiltonian算符,=-2JS_1·S_2-DS_(s1)导出的磁方程拟合,求得交换积分为J=-74.72cm^(-1)(phen)和J=-76.39cm^(-1)(NO_2—phen),表明两个Cu(Ⅱ)-Mn(Ⅱ)双核配合物中有中等强度的反铁磁超交换作用。

New metal complexes of type [Cu(oxap)Mn(L)_2](ClO_4)_2, are synthesized and characterized, where oxap denotes N, N'-bis (2-aminopropyl) oxamido dianion and L denotes 1, 10-phenanthroline(phen) or 5-nitro-1, 10-phenanthroline(NO_2—phen). Variable-temperature (4.2—300K) magnetic susceptibility measurements were recorded for the two complexes and the data are least-squares fit to a susceptibility equation derived from spin Hamiltonian =-2J_1·_2-D_(s1). The exchange integral, J, is found to be -74.72em^(-1) for [Cu(oxap)Mn(phen)_2] (ClO_4)_2, and -76.39cm^(-1) for [Cu(oxap)Mn(NO_2-phen)_2] (ClO_4)_2, indieating that a moderately strong antiferro-magnetic superexehange interaction operates between the metal ions.