Synthesis and characterization of mercury(II) complexes of selones: X-ray structures, CP MAS and solution NMR studies

Mercury(II) complexes of selones (L) having the general formulae, [L2HgCl2], [L3HgCl]Cl and [L4Hg]Cl2 have been prepared and characterized by elemental analysis, IR and NMR (1H, 13C, 15N, 77Se, 199Hg) spectroscopy. A decrease in the IR frequency of the CSe mode upon complexation is indicative of mercury(II) binding via a selone group. Upfield shifts in CSe resonance of selones in 13C and 77Se NMR and downfield shifts in NH resonances in 1H and 15N NMR are consistent with the selenium coordination to mercury(II). The complex of dichloro-bis(N-isopropyl-imidazolidine-2-selone-S)mercury(II), has been characterized by X-ray crystal analysis. The principal components of the 77Se and 199Hg shielding tensors were determined from solid-state NMR data.

Graphical abstractMercury(II) complexes of selones (L) having the general formulae, [L2HgCl2], [L3HgCl]Cl and [L4Hg]Cl2 have been prepared and characterized by elemental analysis, IR and NMR (1H, 13C, 15N, 77Se, 199Hg) spectroscopy. The complex of dichloro-bis(N-isopropyl-imidazolidine-2-selone-S)mercury(II), has been characterized by X-ray crystal analysis. The principal components of the 77Se and 199Hg shielding tensors were determined from solid-state NMR data.Figure optionsDownload full-size imageDownload as PowerPoint slide