| Abstract: The dinuclear metal complexes are important not only for biochemistry but also for magnetochemistry. In this paper, a dinuclear Ni(Ⅱ) complex [Ni2(Htda)2(H2O)6]·4H2O (1) with 1,2,3-triazole-4,5-dicarboxylic acid (H3tda) as ligands has been synthesized and characterized by element analysis, IR spectra, single-crystal X-ray diffraction, thermo gravimetric analysis and superconducting quantum interference device (SQUID). The crystallographic data shows that complex 1 crystallizes in triclinic space group P1 with a=0.721 19(16) nm, b=0.812 81(18) nm, c=0.940 2(2) nm, α=109.526(4)°, β=91.868(4)°, γ=103.304(4)°, V=0.501 88(19) nm3, C8H22N6Ni2O18, Mr=607.74, Dc=2.011 g·cm-3, μ(Mo Kα)=1.982 mm-1, F(000)=312, GOF=1.037, Z=1, the final R1=0.045 1 and wR2=0.117 7 for I>2σ(I). In 1, two 1,2,3-triazole-4,5-dicarboxylic acid ligands bridge two Ni(Ⅱ) ions by two neighboring nitrogen atoms in triazole ring to form a dinuclear Ni(Ⅱ) unit, which is further connected with each others through plenty of hydrogen-bond interactions to construct a three-dimensional (3D) supramolecular architecture. The magnetic study shows that the antiferromagnetic interactions exist between Ni(Ⅱ) ions in dinuclear Ni(Ⅱ) units. CCDC: 747631. |
