Syntheses, Crystal Structures and Thermal Properties of Copper(II) and Cobalt(II) Complexes with a Salen-Type Bisoxime Ligand

Two complexes, [Cu(L)] (1) and [Co(L)(H2O)(2)](n) (2), have been synthesized via the complexation of copper(II) acetate monohydrate or cobalt(II) acetate tetrahydrate with a new Salen-type bisoxime ligand (H2L, 4,4'-dibromo-6,6'-dichloro-2,2'-[-ethylenedioxybis(nitrilomethylidyne)]diphenol), respectively. X-ray crystal structure determination of complex 1 shows that the four-coodinated Cu-II atom lies in the N2O2 coordination sphere of Salen-type bisoxime ligand, and the copper atom of complex 1 has distorted tetrahedral geometry. The crystal structure of complex 2 has indicated that the complex consists of one Co-II atom, one L2- unit and two coordinated water molecules, the coordination number of the Co-II atom is six, and forms an infinite metal-water chain supramolecular structure by intermolecular hydrogen bonds and pi-pi stacking of neighboring benzene rings. Meanwhile, the thermal and photophysical properties of the resulted complexes have also been discussed. CCDC: 712172, 1; 712159, 2.