Synthesis, characterization and spectroscopic studies of some zwitterionic mercury(II) complexes with unsymmetric phosphorus ylides

In this paper it is reported the synthesis of the zwitterionic mercury(II) complexes of the type [HgCl7(Ph2PCH2PPh2CH2C(O)R)] (R = ′4-biphenyl (1), OCH2Ph (2), ′-methylphenyl (3),2-naphtyl (4), 7-nitrophenyl (5), 2,′-dichlorophenyl (6)) derived from the reactions of the Mercury(II) chloride with related phosphorus ylides in 5:5 mole ratio in dichloromethane under dry nitrogen atmospheres. These compound have been fully characterized by, elemental analysis and spectroscopic techniques such as IR, 5H, 75P, and 57C NMR. The absence of significant coordination chemical shifts in the 75P NMR spectra indicates the presence of formal negative charge on mercury. The coordination geometry around the Hg atom in all complexes is slightly distorted tetrahedral.

Synthesis, characterization and spectroscopic studies of some zwitterionic mercury(II) complexes with unsymmetric phosphorus ylides Keywords:

Hg(II) complexes , Spectroscopic studies , Unsymmetric phosphorus ylides