New copper(I) complex involving the flexible N2S2 Schiff-base ligand ca(2)dapte [Cu(ca(2)dapte)(NCS)], [ca(2)dapte = N,N'-bis-(cinnamaldehyde)-1,2-di(o-iminophenylthio)ethane], has been synthesized and structurally characterized by X-ray diffraction analysis. The coordination polyhedron around the Cu(I) center is best described as a distorted tetrahedron. The flexible N2S2 Schiff-base ligand ca(2)dapte acts as a tridentate ligand via two S atoms and one N atom, while the NCS- ligand is coordinated to the metal ion through its nitrogen atom. Crystal data: space group P-1, a = 10.7486(7), b = 12.3737(13), c = 12.7578(11) , alpha = 89.385(7), beta = 68.527(7), gamma = 66.190(8)A degrees; V = 1425.8(2) (3), Z = 2, R = 0.0417, wR (2) = 0.0744.