ELECTROCHEMICAL SYNTHESIS AND STUDIES ON THE REACTIVITY OF HETEROCYCLIC-THIONATO DERIVATIVES OF NICKEL(II) WITH NITROGEN DONOR BASES

The [Ni(S,N)(2)] complexes (S,N = 1,3-thiazolidine-2-thionato, tzdt, 1 ,3-thiazoline-2-thionato, tzt, and 2-mercaptobenzothiazolato, mbt) hav e been obtained in good yield by direct electrochemical oxidation of n ickel in the presence of the corresponding ligand. The [Ni(tzdt)(2)] a nd [Ni(mbt)(2)] derivatives react with nitrogen donor bases to give th e adducts [Ni(S,N)(2)(L)(2)] (L = substituted pyridines and primary am ines) and [Ni(S,N)(2)L] (L = bpy, phen, dmp) also obtained by direct e lectrochemical synthesis. A crystal structure analysis shows that in [ Ni(mbt)(2)(dmp)] the hexacoordinated environment of the nickel atom is formed by two bidentate mbt ligands and one dmp ligand.