On the effect of cyanide ion on the reaction of pentacyanonitrosylferrate(2–) with cysteine

Abstract
The effect of cyanide ion on the reaction of [Fe(CN)5(NO)]2– with cysteine was considered and it was found that the reaction between cystine and cyanide ion must be taken into account in the mechanism, especially at higher concentrations of cyanide ion. This reaction regenerates cysteine. In contrast to earlier reports, two coloured intermediates were detected during the reaction of [Fe(CN)5(NO)]2– with cysteine.

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