Treatment of mercury(II) with norbornene ligand supported by structural and spectral studies

In this work, a new complex of mercury, [Hg(PACN)Cl۲], with ۲,۹-di(piperidin-۲-yl)-۱,۳,۶-triazabicyclo[۴.۲.۱]nonane (PACN) and identified by elemental analysis, FT-IR spectroscopy and single-crystal X-Ray diffraction. In the crystal structure of this complex mercury atom has a HgN۳Cl۲ environment with square-pyramidal geometry. In this complex the coordination number of the mercury(II) ion is ۵. The ligand is potentially five dentate but only uses three states. When mentioned ligand coordinated to mercury, forms two five membered chilate rings. In the crystal network of the complex there is intermolecular C–H···Cl hydrogen bonds, extending the crystal network into three dimensional.pyramalgeomey