Autocatalysis-Driven Clock Reaction II: Kinetics of the Pentathionate–Periodate Reaction

摘要: The pentathionate-periodate reaction has been investigated by spectrophotometrically monitoring the total amount of iodine evolved in presence phosphoric acid/dihydrogen phosphate buffer at 468 nm. majority main characteristics title system is very reminiscent that found recently pentathionate-iodate reaction, a led us to classify generally clock reactions. Along with proposed belong autocatalysis-driven reactions as well. kinetic model published was implemented necessary periodate compose 24-step which mechanisms pentathionate-iodine, pentathionate-iodate, bisulfite-periodate, bisulfite-iodate, iodide-periodate, and well-known Dushman are combined. A thorough analysis revealed direct plays role only produce iodide ion via finite sequence reactions, once its concentration reaches certain level, almost exclusively governed As expected strong catalytic effect composition also can readily be explained influence on reaction.