Cd(II) Complexes with Two New Ligands [2-thiophenecarboxaldehyde-4- phenylthiosemicarbazone and 4-methylbenzaldehyde-4-phenylthiosemicarbazone]: Synthesis, Spectral Characterization and Thermogravimetric Studies

Abstract

Background: We synthesized two new organic chelating agents, such as 2-thiophene carboxaldehyde-4- phenylthiosemicarbazone (TCPTSC) and 4-methylbenzaldehyde-4-phenylthiosemicarbazone (MBP TSC) and applied to chelation with Cd(II). Both the ligands (TCPTSC and MBPTSC) their Cd(II) complexes [(Cd-(TCPTSC-H)2) and (Cd-(MBPTSC-H)2)] are characterized by molar conductivity measurements, elemental analysis, FT-IR, 1H NMR spectroscopy, X-ray powder diffraction (XRD), and field emission scanning electron microscopy (FESEM). Initially the formation of TCPTSC and MBPTSC and their Cd(II) complexes is confirmed by FTIR. Thermogravimetric studies reveal the thermal stability of Cd(II) complexes over their ligands. The XRD and SEM studies reveal the change in crystal structure and morphology of both the TCPTSC and MBPTSC due to chelation with Cd(II). Keywords: 2-thiophenecarboxaldehyde-4-phenylthiosemicarbazone, 4-methylbenzaldehyde-4-phenylthiosemicarbazone, Cd(II) complexes, spectral characterization.