Coordination complex of dipicolinato cobalt(III) complex cation and anion

Abstract

Two examples of a new class of high oxidation state complexes having complex anion and complex cation of cobalt(III) are presented. The complexes [CoL(py)₃][CoL₂] · 2H₂O (1) and [CoL(im)₃][CoL₂] · H₂O (2) (where L = dipicolinato anion, py = pyridine and im = imidazole) are characterized by determining their crystal structures and studying their properties in solution. The complex anionic and cationic parts form layered structures through hydrogen-bond interactions with water molecule of crystallization. Alternate layers of complex cations and anions hydrogen bond with water molecules of crystallization to make tight packed structures.

Keywords:

• Cobalt(III)
• Complex cations and anions
• Pyridine
• Imidazole
• Layered structure
• Hydrogen-bonded assembly

Acknowledgments

The authors thank the Department of Science and Technology (New Delhi) India for the financial support.