Novel Cadmium Dithiocarbamate Complex

Abstract

In this study, a new cadmium(II) complex with ammonium-iminodiacetatedithiocarbamate as ligand, (NH4)3idadtc, was synthesized. This ligand is interesting because of its polydentate nature and ability to form stable complexes with various transition metals. Through its five donor atoms (two sulfur atoms, two oxygen atoms, and one nitrogen atom), it can behave as a bidentate or tridentate ligand and form four- or five-membered chelate rings with metal ions. The sulfur atoms of the dithiocarbamate group play a particularly important role in its practical application in the chemical industry, agriculture, pharmacy, etc. The coordination behavior of (NH4)3idadtc, has previously been investigated in reactions with Cu(II), Ni(II), Pd(II), Au(III), Zn(II) and other metal ions, while data on interactions with Cd(II) have not been available in the literature so far. The aim of this work was to investigate the coordination mode of the (NH4)3idadtc ligand toward the Cd(II) ion. The complex was obtained by reacting cadmium(II) acetate (Cd(CH3COO)2) with the ligand in a 1:2 molar ratio, in a neutral medium, at room temperature. The obtained product was characterized by IR, UV/VIS, ¹H and ¹³C NMR spectroscopy as well as electrical conductivity measurement. Based on the obtained data, it was concluded that an ionic complex was obtained in which the dithiocarbamato-ligand achieves isobidentate coordination through two sulfur atoms. The assumed composition of the complex is (NH4)4[Cd(idadtc)2].