Synthesis and NMR spectroscopy of dichlorobis(acetophenonethiosemicarbazone)mercury(II) formed from phenylmercury(II) chloride and acetophenonethiosemicarbazone: the first example of symmetrisation in organomercury(II)-thiosemicarbazone chemistry

摘要

The reaction of phenylmercury(II) chloride with acetophenonethiosemicarbazone (Hatsc) in ethanol in 1:1 mole ratio undergoes symmetrisation forming the products, HgCl2(Hatsc)(2) and Ph2Hg instead of the anticipated compound PhHgCl(Hatsc). The analytical data, some physical properties, IR and NMR (H-1, C-13, Hg-199) spectroscopy all support the formation of HgCl2(Hatsc)(2). Hg-199 NMR of the solid obtained from the filtrate of the reaction provides evidence for Ph2Hg. This reaction represents the first example of a symmetrisation phenomenon observed in organomercury(II)-thiosemicarbazone chemistry. (C) 1998 Elsevier Science S.A. [References: 34]