Crystal structure and properties of a Cu(II) complex with the tridentate Schiff-base ligand, paeonol-(2-aminoethylpiperazine).

A new copper Schiff-base complex [Cu(C15H23N3O2)(NO3)]NO3 was synthesized and characterized by spectroscopic (IR), thermal (TG/DTA) and electrochemical methods. Single crystal X-ray diffraction revealed that the complex is monoclinic, space group P2(1)/c, with a = 23.549(2), b = 6.583(12), c = 12.765(15) Å, β = 102.823(2)°, V = 1929.4(5) Å3, Z = 4, Dcalcd = 1.601 Mg m-3, F(000) = 964, goodness-of-fit = 1.034 and R1 = 0.0407. The Cu(II) is four-coordinate with distorted square planar geometry. The structure consists of isolated [Cu(C15H23N3O2)(NO3)]+ and a nitrate, which are further linked to a 3D network by significant N-H ··· O, N-H ··· N hydrogen bonds and weak O ··· Cu interaction. [ABSTRACT FROM AUTHOR]