Abstract
Dowex-50W resin, as the aliphatic diamine—transition metal ion (Fe III, CU II, CO II) complexes, has been used as a potentially active catalyst for H 2O 2 decomposition in an aqueous medium. The rate constant, k (per g of dry resin) was evaluated over the temperature range 25–40°C. The reaction was first order with respect to [H 2O 2 in all cases. With 1,6-hexamethylenediamine as a ligand, the rate constant k decreased in the following order; Cu II&>;Co II&>;Fe III. Also, with Fe III-complexes the value of k decreased with increasing the length of the methylene chain between the two amino groups of the ligand. The activation parameters were calculated and a reaction mechanism is proposed.
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