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Kinetics of electrophilic substitution of erbium(III) by ytterbium(III) in an aqueous solution of ethylenediaminetetraacetate

  • S. I. Nikitenko
  • L. I. Martynenko
  • N. I. Pechurova
  • V. I. Spitsyn
Inorganic Chemistry
  • 17 Downloads

Conclusions

  1. 1.

    Electrophilic substitution in ethylenediaminetetraacetates of rare-earth(III) elements, independently of the nature of the leaving cation, is accomplished according to two competing mechanisms: an acid dissociation mechanism and an associative mechanism.

     
  2. 2.

    Exhange according to the acid dissociation mechanism is catalyzed by protons; and depending on the acidity of the medium, singly and doubly protonated intermediate complexes are formed.

     
  3. 3.

    The associative exchange mechanism predominates in less acid media and is realized by means of formation of intermediate binuclear complexes. The limiting step for exchange according to an associative mechanism is the breaking of the metal-nitrogen bond, formed by the leaving cation and the ligand in the intermediate binuclear complex.

     

Keywords

Aqueous Solution Acidity Acid Medium Erbium Exchange Mechanism 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • S. I. Nikitenko
    • 1
  • L. I. Martynenko
    • 1
  • N. I. Pechurova
    • 1
  • V. I. Spitsyn
    • 1
  1. 1.M. V. Lomonosov State UniversityMoscow

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