Synthesis, Crystal Structure and Antibacterial Activity of Schiff Base Ni(II) Complexes Containing Schiff Base and Imidazole

The two nickel (II) complexes [Ni(L)(Himdz)](1)[Ni(L)(Mimdz)](2) were synthesized from the reaction of tridentate Schiff base (1-phenyl-3-[(2-hydroxyphenyl)imino]-1-butanone) (H2L) and monodentate N-heterocycles [imidazole (Himdz), 2-methylimidazole (Mimdz)] with Ni(OAc)(2)center dot 4H(2)O and characterized by elemental analysis, IR, H-1 NMR spectroscopy. An X-ray structure determination of the complexes has been completed. In the solid state, both [Ni(L)(Himdz)] (1), [Ni(L)(Mimdz)] (2) crystallize in P2(1)/c space groups, and exist as dimers due to intermolecular C-H center dot center dot center dot pi interactions. Each of the dimeric molecules forms a one-dimensional zigzag chain via intermolecular N-H center dot center dot center dot O hydrogen bonds involving the heterocycle N-H group, respectively. The antibacterial activities of the ligand and complexes were tested against seven kinds of bacteria. The results show that the complexes 1 and 2 possess inhibiting effects. CCDC: 695200, 1; 695201, 2.