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In the title compound, [Cu2(C11H13N3O3S)2(C2H6OS)2], the Cu(II) cation is N,N',O-chelated by a deprotonated hy-droxy-imino-tosyl-hydrazone ligand and coordinated by a dimethyl sulfoxide mol-ecule. One O atom from the adjacent hy-droxy-imino-tosyl-hydrazone ligand bridges the Cu(II) cation, forming the centrosymmetric dimeric complex. The cation is in an overall distorted N2O3 square-pyramidal coordination environment. The methyl-benzene ring is twisted with respect to the hydrazine fragment, with a dihedral angle of 89.54 (9)° between the planes. An intra-molecular C-H⋯O hydrogen bond occurs. In the crystal, mol-ecules are linked by weak C-H⋯O and C-H⋯S inter-actions. Weak π-π stacking is also observed between parallel benzene rings of adjacent mol-ecules, the centroid-centroid distance being 3.9592 (17) Å.

Crystal structure of bis{μ-4-methyl-N′-[3-(oxidoimino)butan-2-ylidene]benzenesulfonohydrazidato}bis[(dimethyl sulfoxide-κO)copper(II)]