Abstract
Two dinuclear copper(II) complexes (1 and 2) with similar coordination modes, supported by the phenylbenzoxazole system, were synthesized by the self-assembly of the (E) 2-hydroxy-4-[4′-(benzoxazolyl)]benzylideneimine (L) with cupric acetate and cupric chloride, respectively. The X-ray single crystal analysis demonstrates that the copper atom both in 1 and 2 is five-coordinated and features a distorted pyramidal geometry. 2 show a novel dicopper–dichlorine two dimensional coordination polymer with the CuII–Cl–CuII structural motif, while 1 is dicopper–dioxygen complex with the CuII–O–CuII substrate. Magnetic property of 2 indicates antiferromagnetic (AF) coupling between two identical Cu2+ ions and provides satisfactory fits for 2 in the temperature range 2–300K with the following parameters: J=−2.68cm−1, g1=g2=2.15. These results indicate that the anion will influence the stability of Schiff base ligand, which further influence the various architectures and magnetic property of coordination complexes.
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