Abstract The structure of the title compound has been determined by X-ray methods. Crystals are monoclinic, space group C2/ c with Z = 4 in a unit cell of dimensions a = 21.992(11), b = 7.788(3), c = 17.604(12) Å, β = 128.05(3)°. The structure has been solved from diffractometer data by Patterson and Fourier methods and refined by full-matrix least-squares to R = 0.0377 for 1443 independent observed reflections. The copper atom lies on a two-fold axis and is chelated to two pyridoxylidene ligands through the imino N and the phenolate O in a trans-configuration with a θ value of 15.9(2)°. The complexes adopt a butterfly arrangement and are held together by a weak hydrogen bond so forming zig-zag strip-like chains.