Stassen Arno F, Kooijman Huub, Spek Anthony L, de Jongh L Jos, Haasnoot Jaap G, Reedijk Jan
Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands.
Inorg Chem. 2002 Dec 2;41(24):6468-73. doi: 10.1021/ic0257470.
Two new isostructural compounds, dichlorobis(1-(2-chloroethyl)tetrazole)copper(II) (1) and dibromobis(1-(2-chloroethyl)tetrazole)copper(II) (2), have been prepared. The synthesis, characterization, and spectral and magnetic properties as well as the crystal and molecular structures of 1 and 2 have been studied. Both complexes form two-dimensional, distorted square grid planes of copper and halides, distinctly separated by layers of tetrazole ligands. The differential (ac) magnetic susceptibility, chi = (deltaM/deltaH)(T), and magnetization M(H) of both complexes have been studied as a function of temperature and field. The compounds possess a ferromagnetic interaction within the isolated copper-halide layers (J/k(B) = 8.0 K, J/k(B) = 10.2 K, respectively, for the chloride and the bromide, and T(c) = 4.75 K, T(c) = 8.01 K). The magnetic coupling J'/k(B) between the different layers is found to be very weak (|J'/J| <or= 2 x 10(-2)).
已制备出两种新的同构化合物，二氯双（1 - （2 - 氯乙基）四唑）铜（II）（1）和二溴双（1 - （2 - 氯乙基）四唑）铜（II）（2）。对1和2的合成、表征、光谱和磁性性质以及晶体和分子结构进行了研究。两种配合物均形成由铜和卤化物构成的二维扭曲方格平面，被四唑配体层明显分隔开。研究了两种配合物的微分（交流）磁化率χ = （ΔM/ΔH）（T）和磁化强度M（H）随温度和磁场的变化。这些化合物在孤立的铜 - 卤化物层内具有铁磁相互作用（对于氯化物和溴化物，J/kB分别为8.0 K和10.2 K，且Tc = 4.75 K，Tc = 8.01 K）。发现不同层之间的磁耦合J'/kB非常弱（|J'/J|≤2×10⁻²）。
