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1 2009

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Reactions of the First Cisplatin Hydrolytes cis-[Pt(15NH3)2(H2O)Cl]+ with L-Cysteine

Hadi S., Appleton T. G.

Polish Journal of Chemistry

2009

Vol. 83, nr 3

437-443

The interactions of cis-[PtCl(15NH3)2(H2O)](NO3) (2) with L-cysteine (H2cys) was investigated in aqueous solution. In this reaction, the polymeric solid was not formed and the ammine liberation was slower than the similar reaction for cis-[Pt(15NH3)2(H2O)2](NO3) (3). It is also observed that although in the reactions of 2 with a variety of thiols gave different ultimate product in each reaction, initially the only product observed was a platinum(II) species with chloride and the thiolate ligand bound monodentate through sulphur. In this reaction, after the formation of a species with thiolate bound monodentate cis-[PtCl(15NH3)2(Hcys-S)] (7), this initial product was then converted to some other complexes, trans-[PtCl(15NH3)(Hcys-S)2] (8), cis-[PtCl(15NH3)(Hcys-S)2] (9) and cis-[{Pt(15NH3)2Cl}2(Hcys- -S)]2+ (10). Unlike the reactions of 2 and 3 with other thiols, the bis (thiolate) platinum(II) and dinuclear sulphur-bridged complexes were not formed in solution.