H-1, C-13 AND HG-199 NMR-STUDIES OF THE -NHCS-CONTAINING LIGANDS WITHMERCURIC HALIDES

The reaction of mercury(II) halides with imidazolidine-2-thione, 1,3-d iazinane-2-thione and 1,3-diazepine-2-thione yielded complexes of stoi chiometry HgL(2)Cl(2) and HgL(2)Br(2). The C(2) resonance of all thion e ligands shifted more for HgBr2 complexes compared with HgCl2. The Hg -199 NMR chemical shift range is within -805 to -1008 ppm for HgL(2)Cl (2) complexes and -1124 to -1394 ppm for all HgL(2)Br(2) complexes. Al so C-13 and Hg-199 NMR chemical shifts are compared for five-, six- an d seven-membered ligands after complexing with mercuric halides. Copyr ight (C) 1996 Elsevier Science Ltd.