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Z. Naturforsch. 2014, 69b, 62 – 70
doi:10.5560/ZNB.2014-3242
Syntheses, Crystal Structures and Magnetic Properties of Two Nickel(II) Compounds with 4,4′-Bipyridine Ligands
Xiao-Ke Yu, Xiang-Sheng Zhai, Yue-Qing Zheng, and Hong-Lin Zhu
Center of Applied Solid State Chemistry Research, Ningbo University, Ningbo, 315211, P. R. China
Reprint requests to Prof. Dr. Yue-Qing Zheng. Fax: Int. +574/87600747. E-mail: yqzhengmc@163.com
Received September 22, 2013 / published online December 30, 2013
Hydrothermal reactions of 4,4′-bipyridine, benzoic acid/p-methylbenzoic acid, Ni(NO3)2 · 6H2O and NH4OH yielded [Ni(bpy)1.5(H2O)2(BA)2]·H2O (1) and [Ni(bpy)(HMBA)(MBA)2]n (2) (bpy = 4,4′-bipyridine, HBA = benzoic acid, HMBA = p-methylbenzoic acid). The Ni(II) ions of compound 1 are six-coordinated and bridged by 4,4′-bipyridine ligands to form a binuclear structure while complex 2 features polymeric chains which are connected by 4,4′-bipyridine molecules. Variable-temperature magnetic susceptibility measurements from 300 to 30 K showed the presence of weak ferromagnetic interactions between the Ni(II) (S = 1) ions via the 4,4′-bipyridine bridges.
Key words: Ni(II) Complexes, Hydrothermal Reactions, Benzoic Acid, Bipyridyl, Magnetism
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ZNB130242-ESM.pdf