N,N′-双(2-吡啶甲基)二硫代草酰胺根桥联的三核铜(Ⅱ)配合物的合成及表征

SYNTHESIS AND CHARACTERIZATION OF TRINUCLEAR COPPER(Ⅱ) COMPLEXES BRIDGED WITH N,N′ Bis(2 PYRIDYLMETHYL) DITHIOOXAMIDATE

０前言多原子桥联配体的多核配合物中，顺磁离子间磁偶合作用的研究对阐明磁性和结构的关系以及设计新型分子基磁性材料具有重要的理论意义。草酸根及草酰胺桥根桥联的多核配合物得到了较为广泛和深入的研究［１－５］。为了研究硫原子取代氧原子后，桥基对传递磁交换作用...

Two new trinuclear copper(Ⅱ) complexes bridged with N,N′ Bis(2 pyridylmethyl) Dithiooxamidate, [Cu 3L 2](ClO 4) 2(1) and [Cu 3L 2](NO 3) 2(2) (H 2L=N,N′ Bis(2 pyridylmethyl) Dithiooxamide), have been synthesized, and characterized by elemental analyses, IR, UV visible spectra, conductance and EPR spectra The variable temperature magnetic susceptibility for complex (1) has been measured in the range of 1 5￣298K Experimental data of magnetic susceptibility are successfully fit to theoretical value based on the spin Hamiltonian operator: H=-2J(S 1S 2+S 2S 3)-2J′S 1S 3, S 1=S 2=S 3=1/2 , giving the magnetic exchange parameters of 2 J =-170 cm -1 and 2 J ′=-7 2 cm -1 This result indicates the presence of a strong antiferromagnetic spin exchange interaction between the Cu(Ⅱ) ions