For some time, semi- and thiosemicarbazones have been a subject of interest to researchers of different profiles. In view of the fact that these compounds form with many metals complexes of diverse chemical, physical and structural characteristics, they are of special interest to coordination chemists. In addition, many of these compounds have shown a wide spectrum of biological activity, so that they have also become a subject of intense research for pharmacologists. New binuclear copper(II) complex [CuL]2 has been obtained by interaction of o-vanillin Smethylisotiosemicarbazone with salicylic aldehyde and copper acetate (in 1:1:1 molar ratio) in methanol. Compound is soluble in chloroform, dimethylformamide, less soluble in ethanol and methanol and insoluble in water. It has been characterized by IR spectroscopy and X-ray diffraction method. In the IR spectrum of complex the bands in 3300-3400 cm-1 region assigned to NH2 functional group and in 3113 cm-1 band assigned to the oscillations of the OH group are not observed. The intense absorptions recorded in the 1163-1240 and 1024-1139 cm-1 domains were attributed to the CAR-O stretching oscillations of the coordinated deprotonated hydroxyl group. Intensive absorption bands in the range of 1496-1526 cm-1 are attributed to azomethine groups (-HC = N-). At 1586-1601 cm-1 the valence oscillations of the C=N and C=C double bonds of the coordinated fragment are recorded. All these confirm the condensation of the Schiff base with salicylic aldehyde to form the [CuL]2 coordination compound. Compound [CuL]2 crystallizes in the monoclinic space group P21/n. The structural data confirms that bideprotonated L2- ligand coordinates to the metal ion through O2N2 set of donor atoms, forming one five membered CuN3C and two six membered CuOC3N metallocycles, with the sequence 6, 5, 6 (Fig. 1 and 2). Cu(II) centers are four-coordinated by means of two nitrogen and two oxygen atoms with the distances: 1.903(3) Ǻ (Cu-O1), 1.899(3) Ǻ (Cu-O3), 1.920(3) Ǻ (Cu-N1) and 1.942(3) Ǻ (Cu-N3). Coordination geometry of this compound is square pyramidal with O(1)O(3)N(1)N(3) donors at the base, and O(3) atom of the neighboring complex in the vertex, with Cu(1) – O(3)* bond length of 2.807 Ǻ. As a result, in the crystal, the CuL complexes form centrosymmetric dimers, that are further joined through week C–H...O hydrogen bonds.