Crystal and molecular structure of bis(N-ethanol-2-oxy-1-naphthylideneaminato)copper(II)

The crystal structure of the title compound has been determined from single-crystal X-ray diffraction data. The compound crystallizes in the monoclinic space groupp2₁ witha=5.5406(4),b=17.0461(9),c=11.3762(6) Å,=93.99(1)°, andZ=2. The structure was solved by direct methods, and refined by full-matrix least squares toR=0.036 andR_w=0.039 for 2134 intensities above 3(7).The ethanolic O atoms [O(3) and O(4)] are not involved in the Cu coordination. The two bidentate ligands are connected to copper(II) atoms by their phenolic O atoms and imino N atoms in the O-O and N-N trans positions. A tetrahedral distortion of the square coordination is observed. The ethanolic oxygen atoms are involved as donors in intramolecular hydrogen bonds O(4)-H-O(1) and as donors and acceptors in intermolecular O(3)-H-O(4) ones. The molecule is substituent-trans, as the ethanol groups are oriented towards the opposite sides of the mean molecular plane. The molecular structure is compared with the literature data.