Synthesis and X-ray structural characterization of square-pyramidal copper(II) complex with aminoguanidine derivative

• Synthesis, X-ray structural characterization and spectroscopic behavior of a mononuclear copper(II) complex.
• Cu(II) is situated in a slightly deformed square-pyramidal environment.
• Because of hydrogen bonding, the coordination compound can be regarded as a pseudo-polymer.

Aminoguanidine and its derivatives have shown antiglycation activity and are effective antioxidants. Complexes with ligands derived from aminoguanidine are relevant to both medicinal and bioinorganic chemistry. In this article, we describe the synthesis and characterization of a new mononuclear complex of copper(II) with a chelating ligand derived from aminoguanidine. Single crystals of the resulting complex were obtained by recrystallization from isopropanol. The molecular structure of the complex was obtained by X-ray diffraction which shows a distorted square pyramidal geometry, where copper(II) is coordinated to four nitrogen atoms (base of the pyramid) and to one chlorine atom (pyramid peak). The spectroscopic behavior (FT-IR and UV–vis) of both the complex and the ligand were examined.

The molecular structure of the complex of copper(II) (left) and pseudo-polymer (right).Figure optionsDownload as PowerPoint slide