The Synthesis, Crystal Structure and Magnetic Properties of Trinuclear Copper (II) Metal Complex [Cu_3 (LH)_4]Cl_2(LH_2=2-Tolylsulfonylamido-7-Hydroxy-1,8-Naphthyridine)

2-tolylsulfonylamido-7-hydroxy-1,8-naphthyridine配基之合成及其參核銅（II）金屬錯合物之構造及磁性的研究

汪若蕙(Ruoh-Huey Uang) ； 彭旭明(Shie-Ming Peng)

《中央研究院化學研究所集刊》 43期 (1996/03) Pp. 117-126

https://doi.org/10.6522/BICAS.1996.43.11

摘要

本文中合成了一個新四芽配基：2-tolylsulfonylamido-7-hydroxy-1,8-naphthyridine(LH_2)。其參銅錯合物［CU_3(LH)_4］Cl_2之空間群為P2_1/c，室元參數為a=13.988（2）Å，b=17.248（6）Å，c=18.862（4）Å，β=100.83（1）°，Z=4。以3780個繞射點作結構的最小方差精算，所得的指數為R=0.086及R_w=0.082。此錯合物為此四芽配基脫去磺醯胺上的質子成為負一價的陰離子配基來咬合三個銅離子。此三個銅離子排列幾近一直線，其角度為175.8（10）°並有較長的金屬之間的距離（2.812(4)Å，2.782(3)Å）。此錯合物的變溫磁化率可利用一非線性函數作數值擬合，所得的反鐵磁偶合常數J=-41cm^(-1)，J'=-6cm^(-1)。由於金屬之間距離較長，此反鐵磁效應是借由配基分子軌域之超交換作用來達成。

並列摘要

The new ligand, 2-tolylsulfonylamido-7-hydroxy-1, 8-naphthyridine (LH_2), has been prepared and used to react with transition metals. The trinuclear metal complex (Cu_3 (LH)_4)Cl_2 was crystallized in monoclinic space group P2_1/c with a=13.988(2)Å, b=17.248(6)Å, c=18.862(4)Å, β=100.83(1)°, and Z=4. Refinement of 3780 observed reflections out of 8895 unique reflections and 838 parameters gave R=0.086 and R_w=0.082. The molecule has a linear metallic chain with an angle of 175.8(10)°. The long distance between adjacent copper ions indicates that no bonding interaction exists. Variable temperature magnetic data was fitted by using an equation derived from the spin Hamiltonian. The spin-exchanging integral J and J' are obtained to be -41cm^(-1) and -6cm^(-1), where J is involved in the spin coupling interaction between adjacent copper ions and J' is involved in the interaction between terminal ions. The antiferromagnetic coupling is described in this trinuclear metal complex.