A new trinuclear nickel complex, [Ni_3(pdc)_3(2,2'-bipy)_3(H_2O)_2]·2H_2O (H_2pdc = pyridine 2,6-dicarboxylic acid, 2,2'-bipy = 2,2'-bipyridine) has been hydrothermally synthesized and characterized by IR, elemental analysis and X-ray diffraction methods. Crystal data for this complex: monoclinic, space group P2_1/n, a = 21.206(4), b = 10.002(2), c = 28.066(6)A,β = 108.18(3)°, C_51H_41N_9Ni_3O_16, M_r = 1212.06, V= 5.656(2) nm~3, D_c = 1.423 g·cm~(-3),μ(MoKa) = 1.062 mm~(-1), Z= 4, F(000) = 2488, GOOF = 1.034, the finalR = 0.0543 and wR= 0...