Abstract
A comparison is reported between the products formed by the ( n, α) reaction in hydrated and anhydrous sodium hexachloroiridate (IV), as well as in the ammonium salt. The effects of hydration and dehydration after the neutron irradiation are also described. The results show that both water of hydration and ammonium ions lead to the survival of a smaller proportion of ∗Ir(IV) species. With the ammonium salt some unidentified chloroamine complexes of Ir(III) are produced. In the hydrated salts the iridium fragments contain a smaller average number of attached chlorine atoms than in the anhydrous salts. During hydration and dehydration annealing reactions, leading to an increase in ∗Ir(IV) products, outweigh other effects. These observations are interpreted in terms of a model based on donor-trap electron transfer reactions in the solid.
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