162048-51-3Relevant academic research and scientific papers
Studies on Pt-S bonds. Competition of chelating methylsulfanyl- or methylsulfinyl-acetate, -benzoate and -phenolate for PtII(H2NCH2CH2NH2)
Pasini, Alessandro,Moroni, Maurizio
, p. 1093 - 1097 (2007/10/03)
The reactions of [Pt(en)(L-S,O)]+ (en = ethane-1,2-diamine) with L′, where both L and L′ are the anionic chelating ligands methylsulfanylacetate, 2-(methylsulfanyl)benzoate, 2-(methylsulfanyl)phenolate and their methylsulfinyl analogues, have been studied by 1H NMR spectroscopy in D2O solutions at 40°C. Thioethers bind more strongly than sulfoxides to Pt(en) and within each series the order of affinity towards Pt is -OC6H4SMe > -O2CCH2SMe > -O2CC6H4SMe and -OC6H4S(O)Me > -O2CCH2S(O)Me > -O2CC6H4S(O)Me. The first step of the reactions is substitution of the Pt-O bond of L by the Pt-S bond of L′ to give [Pt(en)(L-S)(L′-S)], with both ligands monodentate, S-co-ordinated, followed by closure of the chelate ring of L′, to give [Pt(en)(L′-S,O)]+, which occurs by displacement of the Pt-S bond of L by the oxygen atom of L′. The disubstituted species [Pt(en)(O2CCH2SMe)2], [Pt(en)(O2CC6H4SMe)2] and [Pt(en)(O2CCH2SMe){OC6H4S(O)Me}] are stable at 40°C and present at the end of the reactions in equilibrium with the reactants and the products. Only the former, however, could be isolated as a pure compound.
