Abstract

Nine kinds of nitroamminecobalt (III) complex compounds were irradiated with slow neutrons for 1,5 or 30 hours in JRR-1 reactor. After various storage times the 60Co-labelled recoil species in the irradiated compounds were separated by means of procedures involving paper electrophoresis, paper chromatography, ion exchange, or precipitation. It was found that the labelled species were composed of the target complex, Co 2+ ion and the complexes produced through incorporation of outer ions (or molecules) as ligands. The results can be explained by assuming that an electrostatic interaction plays an important role in recoil reactions. The effects of irradiation and storage time on the distribution of recoil species were also investigated.

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