Chem. J. Chinese Universities ›› 1988, Vol. 9 ›› Issue (9): 960.

• Articles • Previous Articles     Next Articles

The Polarographic Behavior of Cu(Ⅱ)-Ethylene-Diamine System and Determination of Stability Constants in Presence of Deficient Ligand

Yu Huaqiang1, Zhou Bensheng2   

  1. 1. Chongqing General Chemical Industrial Company;
    2. Nanjing Institute of Chemical Technology
  • Received:1987-02-08 Online:1988-09-24 Published:1988-09-24

Abstract: The polarographic curve of Cu(Ⅱ)-ethylenediamine (En)system is divided into two or three waves when CEn/CCu<2. The 1st wave corresponds to Cu2+ +2e+Hg→Cu(Hg); the 2nd, 2CuEn2++2e+Hg→Cu(Hg)+CuEn22+ ; the 3rd,CuEn2++2e+Hg→Cu(Hg)+En and CuEn22+2e+Hg→Cu(Hg)+2En. The possibility of determining both of the stability constants of CuEn2+ and CuEn22+ , β1 and β2, polarographically in presence of deficient ligand is discussed.

Key words: Complex, Polarography, Stability constant

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