Comprehensive Study on the Synthesis and Characterization of Cr (III), Mn (III), Fe (III) and Co (II) of Thiocarbohydrazone Metal Complexes

Thiocarbohydrazones are versatile O, S, N-donor ligands that form stable chelates with transition metals. We have carried out the synthesis, characterization and thermal study of a thiocarbohydrazone ligand (L1H2) derived by the condensation of 2-hydroxybenzaldehyde and p-nitrobenzaldehyde with thiocarbohydrazide and its metal complexes obtained by the reflux with Cr(III), Mn(III) Fe(III) and Co(II). The ligand and metal complexes were characterized by elemental analysis, FT-IR, 1HNMR, mass spectrometry and thermogravimetric analysis (TGA). The spectroscopic results reveals that the ligands behavior towards the metal ion, the coordination number were shown to be six. The comparative thermal stability of the ligand and its metal complexes were studied.