Acta Phys. -Chim. Sin. ›› 1993, Vol. 9 ›› Issue (05): 692-697.doi: 10.3866/PKU.WHXB19930523

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Studies on Kinetics of the Fast Reaction Between Potassium Permanganate and Acetylacetone

Li Da-Zhen; Deng Xi-Xian; Wang Yu-Wen; Hou En-Jian   

  1. Chemistry Department, Beijing Normal University, Beijing 100875
  • Received:1992-03-24 Revised:1992-07-31 Published:1993-10-15
  • Contact: Deng Xi-Xian

Abstract: The kinetics of the fast reaction between MnO_4~- and diacetone (Hacac) in acidic medium has been studied by the continuous flow-spectrophotometric method. This reaction is second-order overall, and the order with respect to both MnO_4~- and Hacac is one. Activation energy E_α and preexponential factor A has been determined. E_α=4.91×10~4 J·mol~(-1), A=9.75×10~9 mol~(-1)·dm~3·s~(-1). and the relation between k and T is In(k/mol~(-1)·dm~3·s~(-1))=23.0-5.91×10~3/(T/K). A possible mechanism of this fast reaction has been proposed.

Key words: Continuous-flow-spectrophotometric method, Fast reaction, KMnO4, Diacetone