TRANS-2-STYRYLBENZOTHIAZOLE COMPLEXES WITH MERCURY(II) HALIDES - SYNTHESIS, CHARACTERIZATION AND X-RAY CRYSTAL-STRUCTURE OF DIIODOBIS(TRANS-2-STYRYLBENZOTHIAZOLE)MERCURY(II)

The synthesis of trans-2-styrylbenzothiazole (L) and of its complexes with mercury(II) halides is reported. Complexes with the formulae [Hg2 (L)Cl4], [Hg(L)Br2], [Hg(L)2I2] and [Hg(L)I2] were isolated and charac terized by conventional chemical analysis, electronic and IR spectra a nd by thermal analysis. For one of these complexes, [Hg(L)2I2], the X- ray crystal structure was also determined. The complex consists of dis crete [Hg(L)2I2] units in which mercury, located on a two-fold axis, s hows a distorted tetrahedral coordination and the ligand molecules are bonded via nitrogen atoms with Hg-I = 2.61(2) angstrom and Hg-N = 2.3 6(1) angstrom bond distances.