物理化学学报 >> 1992, Vol. 8 >> Issue (04): 500-504.doi: 10.3866/PKU.WHXB19920414

研究简报 上一篇    下一篇

二过碘酸合镍(IV)氧化酒石酸钠的动力学

谢恩海; 孟庆水; 王之朴   

  1. 河北大学化学系,保定 071002
  • 收稿日期:1990-12-16 修回日期:1991-06-07 发布日期:1992-08-15
  • 通讯作者: 王之朴

Kinetics of Oxidation of Sodium Tartrate by Ni(IV) Periodate Complex in Aqueous Alkaline Medium

Xie En-Hai; Meng Qing-Shui; Wang Zhi-Pu   

  1. Department of Chemistry, Hebei University, Baoding 071002
  • Received:1990-12-16 Revised:1991-06-07 Published:1992-08-15
  • Contact: Wang Zhi-Pu

关键词: 四价镍, 停止流动法, 化学动力学及机理, 氧化还原反应

Abstract: The kinetics and mechanism of electron transfer from sodium tartrate to Ni(Ⅳ) periodate complex have been studied in aqueous alkaline medium using spectroscopic and stopped-flow method. The kinetics exhibits a pseudo first order for the disap-pearance of Ni(Ⅳ) periodate complex when substrate is present in excess. The order for the substrate found is not an integer. Additon of NaIO_4 and NaOH affects the reaction rates. Results are interpreted in terms of a mechanism involving two separated steps of one-electron transfer from the substrate to the species containing Ni(IV). The activation parameters of this reaction have been calculated.

Key words: Diperiodatonicolate, Stopped-Flow method, Kinetics and mechanism, Redox reaction