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合成了4种氮氧自由基桥联的五氟丙酸镍双核配合物[Ni(pfpr)_2]_2NITR·nH_2O.对该配合物进行了元素分析和热重-差热分析,测定了红外光谱、紫外-可见光谱、电子顺磁共振和摩尔电导.讨论了配合物的结构,测量了[Ni(pfpr)_2]_2NITPhCl·4H_2O和[Ni(pfpr)_2]_2NITPhOMe·4H2O的变温磁化率(4~300K),表明配合物具有非正规自旋态的Ni(Ⅱ)-Cu(Ⅱ)-Ni(Ⅱ)三核体系的磁行为.通过与理论公式拟合,得到交换积分J值分别为-152.8cm ̄(-1)和-174.6cm ̄(-1),表明镍-自由基-镍之间有较强的反铁磁相互作用.
Four kinds of Ni (pfpr) _2] _2NITR · nH_2O were synthesized by nitrogen-oxygen free radical bridged nickel pentafluoropropionate. The complex was characterized by elemental analysis and TG-DTA, and the IR, UV-Vis, EPR and molar conductance were measured. The structures of the complexes were discussed. The temperature-dependent magnetic susceptibility (4 ~ 300K) of [Ni (pfpr) _2] _2NITPhCl · 4H_2O and [Ni (pfpr) _2] _2NITPhOMe · 4H2O were measured. Magnetic Behavior of Ni (Ⅱ) -Cu (Ⅱ) -Ni (Ⅱ) Trinuclear System. By fitting with the theoretical formula, the exchange integral J values were -152.8 cm -1 and -174.6 cm -1, respectively, indicating strong antiferromagnetic interaction between Ni-free-nickel interaction.