Synthesis and crystal structure of a new three-dimensional supramolecule of copper(II) Schiff base complex

A new three-dimensional supramolecule composed of copper-Schiff base complex, [Cu(naphdien)]Cl center dot H2O, where naphdien is Schiff base of 2-hydroxy-1-naphthaldehyde and diethylenetriamine, has been synthesized and determined by single-crystal X-ray diffraction. It belongs to the monoclinic system, space group P2(1)/c, with a = 7.3490(15), b = 7.0847(16), c = 30.845(3) angstrom, beta = 95.33(3)degrees, V = 1599.0(5) angstrom(3), Z = 4, C15H20ClCuN3O2, M-r = 373.33, D-c = 1.551 g/cm(3), mu = 1.543 mm(-1), F(000) = 772, R = 0.0536 and wR = 0.0927 for 2788 unique reflections with 1659 observed ones (I > 2 sigma(I)). In the crystal structure, mononuclear units [Cu(naphdien)]Cl.H2O are linked into a two-dimensional framework via strong hydrogen bonds, and extended into a three-dimensional supramolecular structure through pi-pi stacking interactions.