Synthesis, Crystal Structure, and Electrochemical Properties of the Complex [Ni(imidazole)6](DBSH)2 · 2DMF

摘要

The title complex [Ni(Im)6](DBSH)2 · 2DMF (H2DBSH = 3,5-dibromosalicylaldehyde, Im = imidazole, DMF = N,N-dimethylforrnamide) has been prepared and characterized by X-ray diffraction analysis. It crystallizes in the monoclinic system, space group P2_1/c with a = 14.7271(13), b = 9.0221(8), c = 18.1143(16) A, β = 100.408(2)°, V= 2367.2(4) A~3, Z=2, M_r = 1171.22, F(000) = 1172, ρ_c = 1.643 g/cm~3 and μ(MoK_α) = 3.844 mm~(-1). The structure was refined to R = 0.0425 and wR = 0.1052 for 3646 observed reflections. The X-ray crystal structure analysis revealed that the center nickel(II) cation is bonded to six nitrogen atoms from six imidazole to form a six-coordinated elongated octahedron. The complex includes a DBSH~(2-) anion and two DMF solvates. The intramolecular and intermolecular hydrogen bonds in the crystal structure play remarkably important role in the thermostability of the title complex. The electrochemical properties were studied in DMF with an electrochemical analyzer.