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    • Kinetics of oxidation of nickel(II) aza macrocycles by peroxydisulphate in aqueous media

      J Lalitham V R Vijayaraghavan

      Volume 112 Issue 5 October 2000 pp 507-514

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/112/05/0507-0514

    • Keywords

       

      Kinetics; oxidation; peroxydisulphate; Ni(II) hexaazamacrocycle; Ni(II) pentaaza macrocycle

    • Abstract

       

      The kinetics of the oxidation of nickel (II) hexaaza and nickel (II) pentaaza macrocycles by the peroxydisulphate anion, S2O82−, were studied in aqueous media. Effect of pH on reaction rate was also studied. The rate increases with increase of S2O82− concentration. Rates are almost independent of acid betweenpH 4 and 2, giving overall a relatively simple second-order rate law followed by oxidation within the ion pair solvent shell. Using rate =+1/2 d[Ni(L)3+]/dt =k[Ni(L)2+][S2O82−], oxidation rate constants were determined.

    • Author Affiliations

       

      J Lalitham1 V R Vijayaraghavan1

      1. Department of Physical Chemistry, University of Madras, Guindy Campus, Chennai - 600 025, India

    • Dates

       
      Published
      October 2000
      Manuscript received
      3 May 2000
      Manuscript revised
      1 July 2000

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