Synthesis, crystal structure and spectroscopy studies of a novel five-coordinated Zn(II) ion complex with l-tyrosine and imidazole

Abstract

The new five-coordination zinc(II) complex of formula [Zn(Im)( l-tyr) 2] 2·5H 2O consisting of l-tyrosine ( l-tyr) and imidazole (Im) molecules as ligands was prepared as crystals and characterized by X-ray diffraction, IR-FIR vibrational and UV–Vis electronic spectroscopy. The [Zn(Im)( l-tyr) 2] 2·5H 2O complex crystallizes in the orthorhombic crystal system and P2 12 12 space group. The [ZnN 2N′O 2] chromophore has distorted bipiramidal geometry with value of τ parameter 0.7. The sensitive intra and inter-molecular hydrogen bonds created the layers arrangement and the “pseudo-baskets” fashion. The intraligand charge transfer (ILCT) π– π ∗ and π– π ∗ transitions in the ligands molecule are corresponded to the intensity bands in the UV–Vis region.