SYNTHESIS AND STRUCTURE OF(1,3-DIMETHYLURACIL-5-YL)MERCURY(II) COMPLEXES WITH AROMATIC NITROGEN DONOR LIGANDS

Reactions of(1,3-dimethyluracil-5-yl) mercury(II) acetate with the het erocycles 1,8-naphthyridine (napy) and 2,2'-bipyridyl (bpy) yield comp ounds of general composition [Hg(1,3-DimeU-CS) (heterocycle)] (+). Two examples, [Hg(1,3-DimeU-CS) (napy)] (NO3). H2O (1) and [Hg(1,3-DimeU- CS) (bpy)](ClO4) (4) were crystallized and studied by X-ray crystallog raphy and NMR spectroscopy. H-1 and Hg-199 NMR data on the one hand an d X-ray data on the other reveal differences in the mode of coordinati on for napy mercury complexes in water and in the solid state. While b oth napy and bpy act as chelating Ligands in solution, napy behaves as a monodentate Ligand in the solid state. (C) 1998 Elsevier Science S. A. All rights reserved.