A novel mononuclear supramolecule of copper(II) has been synthesized with Ippyt ligand (Ippyt=3-(4'-imidazole phenyl)-5-(pyrid-2''-yl)-1,2,4-triazole) (1). Compound 1, namely [Cu(Ippyt) 2 (H 2 O) 2 ], has been characterized by single-crystal X-ray diffraction, IR spectrum, elemental analysis and thermogravimetric analysis. Structure determination reveals that the elongated-octahedral geometry is formed in the vicinity of the copper (II) atom being coordinated by four nitrogen atoms from two Ippyt ligands occupying the equatorial position and two oxygen atoms from two coordinated water molecules in the axial position, which together form the N 4 O 2 donor set. Hydrogen bonding interactions between nitrogen and oxygen atoms result in the set up of a supramolecular network architecture. Biological properties including antibacterial activity and superoxide dismutase (SOD) mimetic activity of compound 1 have been investigated by agar diffusion method and the modified Marklund method, respectively. The results indicate that compound 1 exhibits a stronger antibacterial efficiency than the parent ligand and it also has a certain radical-scavenging activity.

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Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.005 Å; R factor = 0.049; wR factor = 0.109; data-to-parameter ratio = 12.3.The centrosymmetric molecule of the title compound, [Zn(C 16 ExperimentalCrystal data [Zn(C 16

Three coordination networks with the 1,2,4-triazole linking units 3-(4Ј-imidazole phenyl)-5-(pyrid-2ЈЈ-yl)-1,2,4-triazole (HIppyt) and3-(pyrazin-2Ј-yl)-5-(4Ј-(pyrid-4ЈЈ-yl)-phenyl)-1,2,4-triazole (Hpypypt), respectively, were synthesized and structurally characterized. The structures of [Mn(Ippyt) 2 ·2H 2 O] (1) and [Zn(Ippyt) 2 · 2H 2 O] (2) were found to be similar despite the presence of different metal ions. When Ippyt was replaced by pypypt to react with Zn(OAc) 2 · 2H 2 O, the 2D coordination polymer, {[Zn(pypypt) 2 ]·2DMF} n (3)

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