Syntheses, crystal structures and antibacterial activities of azido-bridged cobalt(III) complexes with Schiff bases

摘要

Two end-on azido-bridged Co(III) complexes, [Co3(Ll)2(μ_(1,1)-N3)4(N3)2(OH2)(OCH2CH3)]·0.5H2O (1) and [Co2(L2)2(μ_(1,1)-N3)2(N3)2] (2), where L1 and L2 are the deprotonated form of 5-methoxy-2-[(2-morpholin-4-ylethy-limino)methyl]phenol and 2-ethoxy-6-[(2-isopropylamin-oethylimino)methyl]phenol, respectively, were prepared and structurally characterized by physicochemical and spectroscopic methods and single crystal X-ray determination. Complex (1) is a trinuclear Co compound, while complex (2) is a centrosymmetric dinuclear Co compound. In both complexes, the Co atoms are in octahedral coordination. The preliminary biological tests show that the complexes have excellent antibacterial activity.