Synthesis, solid state 31P CP-MAS NMR infrared and Raman studies of mercury(II) complexes of 1,3,5-triaza-7-phosphaadamantane (PTA)

Insoluble mercury(II) complexes of a water-soluble phosphine, 1,3,5-triaza-7-phosphaadamantane (PTA), have been studied by solid state 31P CP-MAS NMR, infrared and Raman spectroscopies. Complexes of the type (PTA)HgX2 show larger coordination chemical shifts but similar J(31P—199Hg) coupling constants to those previously observed for similar trialkylphosphine complexes. These complexes all appear to be dimeric or polymeric. The nitrate complex of the form (PTA)2Hg(NO3)2 has also been isolated and complexes of the type (PTA)4Hg2+ are shown to exist. Keywords: mercury(II) phosphine complexes, solid state 31P NMR studies.