Rearrangement of 2-(2-thienyl)benzothiazoline in the presence of thiophilic metal ions

2-(2-thienyl)Benzothiazoline and 2-(2thienyl)benzothiazol have been synthesized and characterized by several techniques (IR, NMR, UV-VIS, MS) and elemental analysis. The reactions of a solution of 2-(2thienyl)benzothiazoline with Zn, Cd, Hg(II) and Pb(II) ions have been studied. The spectral studies of the isolated complexes showed that the arrangement of the benzothiazoline to the Schiff base, N-2-mercaptophenyl-2′-methyleneimine, had occurred. The factors influencing this arrangement are discussed. Several complexes of 2-(2-pyridyl)benzothiazoline with Cd and Pb(II) were synthesized for purposes of comparison.