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Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (3): 332.

• Articles • Previous Articles     Next Articles

Synthesis and Magnetic Properties of Trinuclear Copper(Ⅱ)Complexes Containing μ-4, 4'-Bipyridine

HAO Song-Qi, ZHANG Xiao-Li, JIANG Zong-Hui, LIAO Dai-Zheng, YAN Shi-Ping, WANG Geng-Lin   

  1. 1. Chem. Dept. Nankai Univ., Tianjiin, 300071;
    2. National Key Lab. of Coord. Chem. of Nanjing Univ.
  • Received:1993-03-09 Revised:1993-10-28 Online:1994-03-24 Published:1994-03-24

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Abstract: Three new cyclic trinuclear copper(Ⅱ) complexes containing4,4' -bipyridine(4,4' -bpy) which acts as the bridging ligand were synthesized, namely [Cu3 (4, 4' -bpy)3(phen)3] (ClO4)6 ·2H2O (1; phen= O-phenanthroline),[Cu3 (4, 4'-bpy)3 (bpy)3] (ClO4)6·H2O (2; bpy=2, 2'-bipyridyl),and [Cu3(4,4' -bpy)3(NO2-phen)3] (ClO4)6·6H2O (3; NO2-phen=5-nitro-o-phenanthroline).Based on IR,elemental analyses, conductivity measurement, electronic spectra, ESRand susceptibility these complexes are proposed to have extended 4, 4' -bipyridine-bridged structure with Cu (Ⅱ) in a distorted square environment.The variable-temperature magnetic susceptibilities of 1 and 3 have been measured (4-300K).Based on the Heisenberg model,the exchange parameter, J, was found to be -0.23cm-1 (for 1) ; -0.90 cm-1( for 3),indicating that a very weak antiferromagnetic spin exchange interaction occurs between the copper(Ⅱ) ions.

Key words: μ-4,4'-Bipyridine, Copper(Ⅱ)-copper(Ⅱ)-copper(Ⅱ), Magnetism

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