H-1, C-13 AND HG-199 NMR-STUDIES OF THE COMPLEXATION OF HGCL2 BY IMIDAZOLIDINE-2-THIONE AND ITS DERIVATIVES

Mercury(II) complexes of imidazolidine-2-thione and its derivatives have been synthesized and their 1H, 13C and 199Hg NMR spectra measured. HgCl2 forms L2HgCl2 type complexes (where L = imidazolidine- 2-thione and its derivatives). The NH group of the ligand is shifted downfield by about +1.37 ppm in the 1H NMR after complexation. The C-2 carbon in the 13C NMR is shifted by −6.50 ppm for mono N-substituted ligands, but by −5.30ppm for N,N'-disubstituted ligands. The 199Hg NMR resonance is shifted by about −60 ppm for N-substituted ligands, but −140 ppm shifts were observed for N, N'-disubstituted ligands. © 1990 Gordon and Breach Science Publishers S.A.