Substitution Reactions of Some Lead(II)-Polyamine-N-polyacetate Complexes wlth Nckel(II)

DOI Web Site
  • NOZAKI Toru
    Department of lndustrial Chemistrpt, Faeulty of Engineering, Ehime Unibersity
  • KASUGA Kuninobu
    島根大学文理学部化学科
  • KAGAWA Norio
    Department of lndustrial Chemistrpt, Faeulty of Engineering, Ehime Unibersity

Bibliographic Information

Other Title
  • ポリアミン-N-ポリ酢酸鉛(II)錯体とニッケル(II)との置換反応

Search this article

Description

The kinetics of the substitution reactions of the lead(II) complexes of ethylenediamine-N, N', N'-tetraaetic acid (EDTA), N-(hydroxyethyl)ethylenediamine-N, N', N'-triacetic acid (EDTA OH), 1, 2-cyclohexanediaminetetraacetic acid (CyDTA) and diethylenetriamine-N, N, N', N", N"-pentaacetic acid(DTPA) with nickel(II) ion have been studied in a pH range 2.3 3.5 at 20 C and an ionic strength O.1 adjusted with sodium perehlorate.<BR>The reactions were followed spectrophotometrically by absorption at the maximum absorption wavelengths of the lead complexes. The initial rate of the reaction (R) is expressed as Rr(k81Pb2) (24 Pb3DH)(PbX)(Ni2)for the EDTA, EDTA.OH and CyDTA systems, and R=(kik2/(H+)) (PbH2X)(Ni2)for the DTPA system.<BR>Contribution of each reaction path to the over-all rate of the reaction was estimated. From the rsults, it was assumed that the reactien for the DTPA system proceeded through the step forming a binuclear intermediate complex, and those for the EDTA, EDTAeOH and CyDTA systems through both the former path and the dissociative path in which a rapid dissociative equilibrium preceded the formation of the nickel complex.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1973 (4), 718-723, 1973-04-10

    The Chemical Society of Japan

Keywords

Details 詳細情報について

Report a problem

Back to top