SYNTHESIS AND NMR-SPECTROSCOPY OF HLOROBIS(ACETOPHENONETHIOSEMICARBAZONE)MERCURY(II) FORMED FROM PHENYLMERCURY(II) CHLORIDE AND ACETOPHENONETHIOSEMICARBAZONE - THE FIRST EXAMPLE OF SYMMETRIZATION IN ORGANOMERCURY(II)-THIOSEMICARBAZONE CHEMISTRY

The reaction of phenylmercury(II) chloride with acetophenonethiosemica rbazone (Hatsc) in ethanol in 1:1 mole ratio undergoes symmetrisation forming the products, HgCl2(Hatsc)(2) and Ph2Hg instead of the anticip ated compound PhHgCl(Hatsc). The analytical data, some physical proper ties, IR and NMR (H-1, C-13, Hg-199) spectroscopy all support the form ation of HgCl2(Hatsc)(2). Hg-199 NMR of the solid obtained from the fi ltrate of the reaction provides evidence for Ph2Hg. This reaction repr esents the first example of a symmetrisation phenomenon observed in or ganomercury(II)-thiosemicarbazone chemistry. (C) 1998 Elsevier Science S.A.