Distorted square-based pyramidal and trigonal bipyramidal geometries in a mercury (II) coordination compound containing 2-(aminomethyl)pyridine ligand

ABSTRACT

The new complex of [Hg(2-AMPy)₂Cl]₂.HgCl₄ (1) was synthesized from the reaction of HgCl₂ with 2-(aminomethyl)pyridine (2-AMPy) in methanolic solution. Suitable crystal of compound 1 for diffraction experiment was obtained by slow evaporation from dimethyl sulfoxide. Resulted complex was characterized by infrared, elemental analysis, thermal analysis, and single crystal X-ray diffraction. In the cationic part of this compound, two five-coordinated mercury centers have two different geometries, including distorted square-based pyramidal geometry by the trigonality index, τ₅, of 0.23 and trigonal bipyramidal geometries by the trigonality index, τ₅, of 0.57.

KEYWORDS:

• 2-(aminomethyl) pyridine ligand
• crystal structure; Hg(II)
• thermal gravimetric analyses

Acknowledgments

We would like to thank the Graduate Study Councils of Islamic Azad University, Omidiyeh Branch for financial support.