Synthesis, crystal structure and spectroscopic properties of a supramolecular zinc(II) complex with N2O2 coordination sphere

A new hexa-coordinated zinc(II) complex, namely [ZnL(H2O)(2)](n) with N2O2 coordination sphere (H2L = 4,4'-dibromo-6,6'-dichloro-2,2'-[ethylenedioxybis(nitrilomethylidyne)]diphenol) has been synthesized and structurally characterized by elemental analyses, IR, UV-vis spectra and TG-DTA analyses, etc. Crystallographic data are monoclinic, space group P2(1)/c, a = 24.634(2) angstrom, b = 10.144(1) angstrom, c = 7.9351(6) angstrom, beta = 91.371(2)degrees, V = 1982.4(3) angstrom(3), Dc = 2.099 g/cm(3), Z = 4. The zinc(II) complex exhibits a slightly distorted octahedral geometry with halogen-substituted Salen-type bisoxime forming the basal N2O2 coordination sphere and two oxygen atoms from two coordinated water molecules in the axial position. The hydrogen-bonding and pi-pi stacking interactions have stabilized the zinc(II) complex molecules to form a self-assembling infinite dual metal-water chain-like structure with the nearest Zn center dot center dot center dot Zn distance of 4.954(4) angstrom. (C) 2013 Elsevier B.V. All rights reserved.