Ligational Behaviour of 1-Picolinoyl–4-phenyl–3-thiosemicarbazide (H₂PTS) Towards Some Transition Metal Ions

Abstract

Complexes of 1-picolinoly-4-phenyl-3-thiosemicarbazide (H₂PTS) with Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Hg(II) and UO₂(VI) have been synthesized and characterized on the basis of elemental analyses, molar conductivities, magnetic moment and spectral (IR and visible) studies. IR spectral data show that H₂PTS behaves in a monoanionic bidentate or tetradentate and bianionic tetradentate manner. All complexes are non-electrolytes. An octahedral structure is proposed for the Cr(III), Mn(II), Fe(III), Co(II) and Ni(II) complexes, while a square-planar one is suggested for Cu(HPTS)Cl.H₂O and Cu(PTS) according to the data of magnetic and electronic spectral measurements.