稳定自由基-六氟乙酰丙酮铜配合物的合成、结构和磁性研究

Synthesis,Crystal Structure and Magnetic Properties of Copper(II)-hexafluoro Acetylace Tonate Complex with Stable Radical

合成了一个单臂氮氧自由基配位化合物[Cu(hfac)2(IM2Py)](hfac=六氟乙酰丙酮,IM2Py=2-(2-吡啶基)-4,4,5,5-四甲基咪唑啉-1-氧基自由基),并对它进行了结构和磁性表征。X-射线单晶结构分析表明,配合物[Cu(hfac)2(IM2Py)]属于三斜晶系,Pī空间群,每个铜离子通过与二个六氟乙酰丙酮的四个氧原子、吡啶环上的一个氮原子和咪唑环上的一个氮原子配位而处于一个八面体构型中。变温磁化率表明分子内铜离子与氮氧自由基之间在高温下存在铁磁偶合作用,同时发现分子间存在弱的铁磁偶合作用。

The mononuclear Cu（hfac）2（IM2Py） complex [hfac=hexafluoroacetylacetone,IM2Py=2-（2-pyridyl）-4,4,5,5-tertramethylimidazoline-1-oxyl] has been synthesized and characterized structurally and magnetically.It crystallizes in the triclinic system,space group Pī.Each Cu（II） ion is hexacoordinated by four oxygen atoms of two different hfac and by two imino nitrogen atoms.Magnetic susceptibility measurements show that a ferromagnetic coupling between the Cu（II） ion and imino nitroxide radical in high-temperature,and weak intermolecular antiferromagnetic interaction are observed.