Hydrothermal Synthesis, Crystal Structure And Properties Of A New Binuclear Nickel(Iii) Complex With 3-(Pyridin-2-Yl)-1,2,4-Triazole((1))

A new binuclear nickel(II) complex Ni-2(HPT)(4)(H2O)(3) (1) has been hydrothermally synthesized with nickel hydroxide, 3,4-pyridine dicarboxylic acid and 3-(pyridin-2-yl)-1,2,4-triazole (HPT) in the mixed solution (the volume ratio of methanol and water is 1:4). It crystallizes in tetragonal space group P4(2)/n, with a = 20.844(1), b = 20.844(1), c = 7.2463(7) angstrom, V = 3148.2(5) angstrom(3), D, = 1.587 g/cm(3), Z = 4 mu(MoKa) = 1.257, F(000) = 1544, the final GOOF = 1.043, R = 0.0437 and w/R = 0.1297. The crystal structure shows that the whole molecule consists of two nickel ions which are bridged by four mu(2)-eta(1):eta(0):-3-(pyridin-2-yl)-1,2,4-triazole anions. The coordination environment of Ni(II) ion is NiN6, giving a distorted octahedral geometry. The thermal stability and fluorescent and magnetic properties of the complex were investigated.