N,N′-双(2-吡啶乙基)二硫代草酰胺根桥联的异三核锰(Ⅱ)铜(Ⅱ)锰(Ⅱ)、镍(Ⅱ)铜(Ⅱ)镍(Ⅱ)和三核镍(Ⅱ)配合物的合成及性质

Syntheses and Properties of Hetero-Trinuclear Mn(Ⅱ)-Cu(Ⅱ)-Mn(Ⅱ), Ni(Ⅱ)-Cu(Ⅱ)-Ni(Ⅱ) and Trinuclear Ni(Ⅱ) Complexes Bridged with N,N′-bis(2-pyridylethyl)dithiooxamidate

以取代的二硫代草酰胺根作为桥联配体,合成了3种新的三核镍配合物[Ni3(Ped)2](ClO4)2(H2O)(1)、[Ni3(Ped)2](NO3)2(H2O)(2)和[Ni3(Ped)2](Ac)2(H2O)2(3),及2种新的异三核铜镍和铜锰配合物[CuNi2(Ped)2](NO3)2(H2O)2(4)和[CuMn2(Ped)2](NO3)2(H2O)2(5)(H2Ped=N,N′-双(2-吡啶乙基)二硫代草酰胺)。通过元素分析、红外光谱、紫外可见光谱、电导、电子顺磁共振谱等对配合物进行了表征,对配合物进行了热分析。测定了配合物(5)的变温磁化率,研究了配合物(5)中Cu(Ⅱ)-Mn(Ⅱ)离子间的磁相互作用,结果表明在Cu(Ⅱ)-Mn(Ⅱ)离子间的磁相互作用具有高自旋基态的非正规自旋态性质。

Five Trinuclear metal complexes bridged with N,N＇-Bis（2-pyridylethyl）-Dithiooxamidate, [Ni3（Ped）2]（ClO4）2（H2O）（1）、[Ni3（Ped）2（NO3）2（H2O）（2）,[Ni3（Ped）2]（Ac）2（H2O）2（3）,[CuNi2（Ped）2[（NO3）2（H2O）2（4）and[CuMn2（Ped）2]（NO3）2（H2O）2（5）（H2Ped=N、N′-Bis（2-pyridylethyl）-Dithiooxamide）, have been synthesized and characterized by elemental analyses, IR, UV-Visible spectra, conductance and EPR spectra. Thermal stabilities of the complexes were studied by TG-DTA analysis from room temperature to 600℃. The variable temperature magnetic susceptibility for complex 5 has been measured in the temperature range of 1.5-298 K. The effective molar magnetic moment of the complex 5 decreased with temperature at first, and reached the smallest value, 7.0 B.M, at 48 K. When temperature decreased from 48 K, the effective molar magnetic moment increased rapidly. This result indicated the presence of a basic state with high spin in the complex 5.