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Proton nmr carbon 13 nmr and electronic absorption spectroscopic studies of the interaction of cyanide with aurothiomalate



Proton nmr carbon 13 nmr and electronic absorption spectroscopic studies of the interaction of cyanide with aurothiomalate



Journal of Inorganic Biochemistry 25(3): 163-174



The reaction between cyanide and aurothiomalate (Autm) has been studied by 1H and 13C NMR spectroscopy and by uv spectroscopy. At cyanide: Autm ratios .gtoreq. 2, aurocyanide, [Au(CN)2]-, is the sole product but was also produced at lower ratios. Two intermediates were also identified. These were a mixed ligand complex, [tmAuCN]-, which accounted for over 80% of the gold at a ratio of cyanide to Autm of 1, and bisthiomalato complex, [Autm2]-, with accounted for 6.8% of the total gold at this ratio of cyanide to Autm. The formation of these complexes may be significant in the antiarthritic activity of Autm since cyanide is produced by potential target cells such as polymorphonuclear leukocytes.

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