Cd(II) Dithiocarbamate Complexes: Synthesis, Spectral Studies, Thermogravimetric Analysis and Semiconducting Behaviour

Five new homoleptic Cd(II) dithiocarbamate complexes (1-5) have been synthesized and characterized by IR, NMR, UV-visible spectroscopic techniques along with thermogravimetric analysis. Singlecrystal X-ray diffraction study of complex 1 revealed a triclinic system with space group P1 and possesses a centrosymmetric dimeric structure. In this complex, both C–H···S and C–H···π intermolecular interactions are playing a crucial role in the stabilization of the dithiocarbamate complex. Complexes (1-5) show weak conductivity at ambient temperature (σrt = 10-9-10-10 S·cm-1) because of the absence of M···S/S···S intermolecular stacking. Plot of log σ versus T–1 in the 303-363 K range indicates their semiconducting behaviour. However, their electrical conductivities gradually increase with increasing temperature and ideally decrease with decreasing temperature range showing their semiconducting nature. TGA showed thermal decomposition of complexes into CdS as the final product with grain size of 1-10 nm.