Correlation between ionic radius and thermal decomposition of Fe(II), Co(II), Ni(II), Cu(II) and Zn(II) diethanoldithiocarbamates

Diethanoldithiocarbamate complexes with Fe(II), Co(II), Ni(II), Cu(II) and Zn(II) were prepared and characterised by elemental analysis, infrared spec troscopy and flame atomic absorption spectroscopy. Their thermal decomposit ion was investigated by TG/DTG and DSC techniques under dynamic air and nit rogen atmospheres. These studies showed that the smaller the metallic ionic radius the higher was their thermal stability and that the bidentate compl ex decomposed in a direct way, with no evidence of thyocyanate intermediate s. (C) 2000 Elsevier Science B.V. All rights reserved.