Synthesis and spectroscopic properties of one mixed metal salophen complex with azide bridge ligands

Dinuclear transition metal complexes have been extensively investigated in molecule-based magnetism and catalysis [1].The complexes have been shown interesting properties depending on metal ions, bridging ligands and anions [2]. In particular, an azide ion as bridging ligand have been used for constructing a variety of structures and developing molecule-based magnetic materials, due to its binding modes such as end-on, end-to-end, and terminal [3]. Here we report the syntheses, characterization and spectroscopic properties of one dinuclear Co(II) and Cu(II) complex with salophen-type and azide ligands. The salophen ligand is prepared from condensation reaction between 4-chloro-1,2-diaminobenzene and salicylaldehyde in ethanol. The complex is obtained from the reaction between one equivalent salophen with Cu(CH3COO)2.H2O and Co(CH3COO)2.4H2O and two equiv. of NaN3 in methanol.