Abstract
The decomposition of the bis(1-pyrrolidinedithiocarbamato) copper(II) complex [Cu(PCD) 2] extracted into isobutyl methyl ketone (IBMK) and di-isobutyl ketone (DIBK) from hydrochloric acid solution (0.01–8 M) has been studied with UV-visible and ESR spectrometry. The mixed-ligand complex CuCl(PCD) is formed as an intermediate and CuCl 2 or CuCl3 − 3, are formed as final products, in the decomposition of Cu(PCD) 2. The concentration of free hydrochloric acid dissolved in the extract has also been determined, and the effect of the free acid on the decomposition has been studied. The decomposition reaction of Cu(PCD) 2 extracted from hydrochloric acid solution can be thought of as a ligand substitution by Cl −, and occurs with both IBMK and DIBK extraction.
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