Copper(II) complex with acetylacetone phenylhydrazone: Synthesis, crystal structure, and thermal stability

Abstract

The Cu(phac)2 complex was synthesized by the reaction of copper(II) acetate with acetylacetone phenylhydrazone (Hphac), and its crystal structure was established by X-ray diffraction: space group P21/c, a = 11.173(3) Å, b = 8.267(2) Å, c = 12.633(4) Å, β = 115.01(3)°, V = 1057.5(5) Å3, Z = 4, R1 = 0.0476. The crystal structure of Cu(phac)2 consists of the centrosymmetrical mononuclear molecules. The central copper(II) ion is coordinated by two oxygen atoms and two nitrogen atoms of two acetylacetone phenylhydrazone ligands. The Cu(phac)2 molecules are linked in layers parallel to the Oyz plane. The oxygen atoms of the ketone fragment are involved in intermolecular bonding, which completes the coordination sphere of the central copper(II) ion to a substantially elongated octahedron. The thermal stability of the Cu(phac)2 complex was estimated under nitrogen at atmospheric pressure and in vacuo.