Ram Dulare

Nickel(II) and copper(II) complexes of 5-o-tolyl-[1,3,4]-oxadiazole-2-thione and ethylenediamine: syntheses, spectral, and structural characterization

The reaction of potassium [N′-(2-methyl-benzoyl)-hydrazinecarbodithioate [K+(H2L)−] with metal acetate yielded M(H2L)2 (M = Ni, Cu), which on reaction with excess ethylenediamine (en) formed mononuclear mixed ligand complexes [Ni(en)2(tot)2] (1) and [Cu(en)2](tot)2 (2). The complexes have been characterized by elemental analyses, IR, magnetic susceptibility, and electronic spectral studies. Molecular structures of [Ni(en)2(tot)2] (1) and [Cu(en)2](tot)2 (2) showed 5-(o-tolyl)-[1,3,4]-oxadiazole-2-thione coordinated through oxadiazole nitrogen in 1 and ionically bonded via thiol sulfur in 2.