Synthesis and spectral studies of complexes between palladium and some thiosemicarbazones

Abstract

This paper reviews the synthesis and spectral studies of some complexes of palladium with thiosemicarbazones: Pd(L¹)NH₃ (L¹: pyruvic acid thiosemicarbazone) and Pd(Lⁱ)₂), (i: 2-4, thiosemicarbazone of: acetophenone (L²), benzaldehyde (L³), p-dimethylaminobenzaldehyde(L⁴)). The ligands and complexes are characterized by means of chemical analysis, thermal analysis, IR, ESI-MS and ¹H-NMR spectroscopy. The obtained data show that in Pd(L¹)NH_3, three coordinate sites are realized by S, N(1) and O-atoms of  L¹ and the fourth coordinate site  by NH₃-group; in Pd(Lⁱ)₂) complexes, Lⁱ acts as anionic bidentate ligands, two coordinate bonds realize through S and N(1) atoms. Especially, the obtained data ¹H-NMR spectrum of Pd(L²)₂ indicate that this complex exists in two isomers, supposed to be cis and trans, in DMSO solutions.