Structural aspects and solution behavior of metallosupramolecular compound of Fe^III ion obtained by proton transfer

Abstract

A supramolecular coordination compound of Fe^III containing pyridine-2,6-dicarboxylic acid (pydcH₂) and 2-aminopyrimidine (2-apym), (2-apymH)[Fe(pydc)₂] · 2H₂O (1), was synthesized at normal conditions and characterized by elemental analysis, FTIR and UV spectroscopic methods, and X-ray crystallography. The crystallographic data of the compound show that it crystallizes in monoclinic lattice with space group P2₁/c. The constituent fragments of the compound were connected to each other by diverse intermolecular interactions such as hydrogen-bonding, π–π stacking, and ion pairing forming a supramolecular system. The solution studies show that there exist molecular aggregations in the solution compared with solid state. In the solution, ternary species are negligible but binary species such as ML₂ and ML₂H are present (L is referred to pydcH₂ moiety).

Keywords:

• Iron
• Pyridine-2,6-dicarboxylic acid
• 2-Aminopyrimidine
• Supramolecular chemistry
• Solution studies

Acknowledgments

The authors thank to the Ferdowsi University of Mashhad for the financial support of this article.