Synthesis, Crystal Structure and Magnetic Properties of Cobalt Coordination Compound Constructed from 1,4-Di(1-imidazolyl)benzene and Sulfate

A cobalt coordination polymers [Co(dib)(SO4)] (1) was obtained by solvothermal assembly of CoSO4 center dot 7H(2)O with sodium formate in the presence of N-donor ligands, namely 1,4-di(1-imidazolyl)benzene (dib). Compound 1 crystallizes in monoclinic system, space group C2/c with a=1.972 26(7) nm, b)=0.977 0(3) nm, c=1.1839 6(4) nm, beta=96.479(2)degrees, V=2.266 8(13) nm(3), Z=4, C24H20N8CoO4S, M-r =575.47, D-c=1.686 g.cm(-3), mu=0.903,, F(000) = 1180, R-int =0.018 3, R=0.024 6, wR=0.072 6. Single-crystal X-ray diffraction analysis revealed that each dib ligand in turn uses its two imidzole groups to connect two metal centers, then the two-dimensional (2D) layer is formed. On the other hand, the 2D layers are further connected by sulfate to give a three-dimensional (3D) pcu topologic structure. In addition, the magnetic property of complex 1 has been investigated in the temperature range of 1.8 similar to 300 K, and the results show the weak antiferromagnetic interactions between Co(II) ions bridged by sulfate. CCDC: 878879.