Kinetics and Mechanism for Oxidation of Dissolved Sulfur Dioxide by Tetracyanodichloroplatinate(IV) in Acidic Aqueous Solution and for Formation and O-S Linkage Isomerization of Sulfitotetracyanochloroplatinate(IV)
Oxidation of SO2.nH2O/HSO3-/SO32- by Pt(CN)4Cl22- has been studied at 25-degrees-C and 1.0 M ionic strength in acidic aqueous solution by use of stopped-flow spectrophotometry. The stoichiometry of the reaction is 1:1 according to Pt(CN)4Cl22- + HSO3 + H2O --> Pt(CN)42- + 2Cl- + HSO4- + 2H+. It is first-order with respect to both [Pt(IV)] and [S(IV)]. The pH-dependence in the region 0.3 < pH < 4.5
