Transition Metal Chemistry

, Volume 7, Issue 2, pp 109–112 | Cite as

Ionic strength dependence of formation constants. Part II: potentiometric study of the copper(II)-malonate-glycinate system in the range 0.01≤I≤1.0

  • Pier G. Daniele
  • Carmelo Rigano
  • Silvio Sammartano
Full Papers


The ternary copper(II)-malonate-glycinate system has been investigated by potentiometric measurements using a glass electrode, at 37° and at different ionic strengths (0.01≤I≤1.0 mol dm−3), with KNO3 as background salt. Complex formation between K+ and malonate has also been taken into account, and the parameters for the dependence on ionic strength have been obtained for each formation constant. A general equation, valid for all the complexes formed in this system, for the dependence, log K=f(I), is also proposed. The stabilization parameters of the ternary complex are also analyzed as a function of the ionic strength.


Copper Physical Chemistry Inorganic Chemistry Ionic Strength Complex Formation 
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  1. (1).
    W. Preetz and E. Blasius,Z. Anorg. Chem., 332, 190 (1964).Google Scholar
  2. (2).
    M. T. Beck,Chemistry of Complex Equilibria, Van Nostrand Reinhold Co., London, 1970.Google Scholar
  3. (3).
    L. G. Sillen and A. E. Martell,Stability Constants, Chem. Soc. Spec. Publ., London, Nr. 17 (1964); Nr. 25 (1971); D. D. Perrin,Stability Constants, Organic Ligands, IUPAC Chemical Data Ser. Nr. 22, Pergamon, Oxford, 1979.Google Scholar
  4. (4).
    P. M. May, P. W. Linder and D. R. Williams,J. Chem. Soc. Dalton Trans., 588 (1977).Google Scholar
  5. (5).
    V. Cucinotta, P. G. Daniele, C. Rigano and S. Sammartano,Inorg. Chim. Acta, 56, L45 (1981).Google Scholar
  6. (6).
    P. G. Daniele, C. Rigano and S. Sammartano,Ann. Chim. (Italy), 70, 119 (1980); V. Cucinotta, P. G. Daniele, C. Rigano and S. Sammartano,Inorg. Chim. Acta, 56, L45 (1981).Google Scholar
  7. (7).
    I. Hansson, Rept.Chemistry of Sea Water, Vol. 8, Dep. Anal. Chem. Univ. of Goteborg, Sweden, 1970;Idem, Acta Chem. Scand., 27, 931 (1973);Idem, ibidem, 924 (1973); A. G. Dickson and J. P. Riley,Marine Chem., 7, 89 (1979).Google Scholar
  8. (8).
    P. Amico, P. G. Daniele, V. Cucinotta, E. Rizzarelli and S. Sammartano,Inorg. Chim. Acta, 36, 1 (1979).Google Scholar
  9. (9).
    G. Ostacoli, P. G. Daniele and A. Vanni,Ann. Chim. (Italy), 63, 815 (1973).Google Scholar
  10. (10).
    G. Arena, R. Cali, M. Grasso, S. Musumeci, S. Sammartano and C. Rigano,Thermochim. Acta, 36, 329 (1980).Google Scholar
  11. (11).
    P. G. Daniele, P. Amico and G. Ostacoli,J. Inorg. Nucl. Chem., 43, 2183 (1981).Google Scholar
  12. (12).
    G. Arena, E. Rizzarelli, S. Sammartano and C. Rigano,Talanta, 26, 1 (1979).Google Scholar
  13. (13).
    A. Sabatini, A. Vacca and P. Gans,Talanta, 21, 53 (1974); P. Gans, A. Sabatini and A. Vacca,Inorg. Chim. Acta, 18, 237 (1976); A. Vacca, personal communication.Google Scholar
  14. (14).
    P. G. Daniele, C. Rigano and S. Sammartano,Thermochim. Acta, 46, 103 (1981).Google Scholar
  15. (15).
    P. G. Daniele, C. Rigano and S. Sammartano,Talanta 0, 000 (1981).Google Scholar
  16. (16).
    P. G. Daniele, C. Rigano and S. Sammartano,Ann. Chim. (Italy), in press.Google Scholar
  17. (17).
    P. G. Daniele, C. Rigano and S. Sammartano, V International,Symp. on Solute-Solute-Solvent Interactions, Florence, Italy, June 2–6, 1980, X56;Idem, work in progress.Google Scholar
  18. (18).
    G. Arena, R. Cali, E. Rizzarelli and S. Sammartano,Transition Met. Chem., 3, 147 (1978).Google Scholar
  19. (19).
    S. K. Shah and C. M. Gupta,Talanta, 27, 823 (1980).Google Scholar
  20. (20).
    S. P. Datta and A. K. Grzybowski,Trans. Faraday Soc., 54, 1179 (1958).Google Scholar

Copyright information

© Verlag Chemie GmbH 1982

Authors and Affiliations

  • Pier G. Daniele
    • 1
  • Carmelo Rigano
    • 2
  • Silvio Sammartano
    • 3
    • 4
  1. 1.Istituto di Analisi Chimica Strumentale dell'UniversitàTorinoItaly
  2. 2.Seminario Matematico dell'UniversitàCataniaItaly
  3. 3.Istituto di Chimica Analitica dell'UniversitàMessinaItaly
  4. 4.Istituto Dipartimentale di Chimica e Chimica Industriale dell'UniversitàCataniaItaly

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