An N4-Tetradentate Hydrazone Ligand That Binds in a Neutral, Mono- and Bisdeprotonated Form to Iron(II) and Zinc(II) Metal Ions

Devaraj Pandiarajan,Thomas Fox,Bernhard Spingler

doi:10.3390/cryst11080982

Abstract

The coordination chemistry of butane-2,3-dione bis (2′-pyridylhydrazone) towards the divalent first-row transition metals zinc and iron has been explored. Depending upon the conditions, the ligand in the six complexes was found to be either neutral, mono, or doubly deprotonated. The zinc(II) and iron(II) complexes were fully characterized by elemental analysis, mass spectrometry, and X-ray diffraction methods.

Highlights

A great interest has been devoted towards the coordination chemistry of first-row transition metal complexes containing organic chelating ligands
Iron and zinc have been found in the active sites of metalloenzymes; they catalyze a wide range of chemical reactions
We have reported a new series of neutral, mono, and doubly deprotonated zinc(II) and iron(II) complexes containing N4 ligand LHn (n: 0–2)

Summary

Introduction

A great interest has been devoted towards the coordination chemistry of first-row transition metal complexes containing organic chelating ligands. Coordination complexes play a significant role in numerous biological functions, which has led to intensive studies in the field of bioinorganic chemistry [1,2,3]. Over the past two decades, tremendous efforts have been devoted to the development of various types of supporting ligands and their metal complexes in order to model and mimic the biological systems. The chemistry of mono and binuclear iron(II) and zinc(II) metal complexes has aroused considerable interest in their use as model complexes as well as their biomedical applications [7,8,9,10,11,12]

Methods

Results

Conclusion