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Monatshefte für Chemie / Chemical Monthly

, Volume 106, Issue 6, pp 1337–1347 | Cite as

0-aminophenol and 8-hydroxyquinoline as ligands of Cu(II) in 1M-Na(ClO4) at 25°C

  • Emilio Bottari
  • Giancarlo Goretti
Anorganische, Struktur- und Physikalische Chemie

Abstract

The complex formation between Cu(II) and 8-hydroxyquinolinat (Ox) was studied with the liquid-liquid distribution method, between 1M-Na(ClO4) and CHCl3 at 25°C. The experimental data were explained by the equilibria:
$$\begin{gathered} \operatorname{Cu} ^{2 + } + Ox \rightleftharpoons \operatorname{Cu} Ox \log \beta _1 = 12.38 \pm 0.13 \hfill \\ \operatorname{Cu} ^{2 + } + 2 Ox \rightleftharpoons \operatorname{Cu} Ox_2 \log \beta _2 = 23.80 \pm 0.10 \hfill \\ \operatorname{Cu} Ox_{2aq} \rightleftharpoons \operatorname{Cu} Ox_{2\operatorname{org} } \log \lambda = 2.06 \pm 0.08 \hfill \\ \end{gathered} $$
The equilibria between Cu(II) and o-aminophenolate (AF) were studied potentiometrically with a glass electrode at 25°C and in 1M-Na(ClO4). The experimental data were explained by the equilibria:
$$\begin{gathered} \operatorname{Cu} ^{2 + } + AF \rightleftharpoons \operatorname{Cu} AF \log \beta _1 = 8.08 \pm 0.08 \hfill \\ \operatorname{Cu} ^{2 + } + 2AF \rightleftharpoons \operatorname{Cu} AF_2 \log \beta _2 = 14.60 \pm 0.06 \hfill \\ \end{gathered} $$

The protonation constants ofAF and the distribution constants between CHCl3−H2O and (C2H5)2O−H2O were also determined.

Keywords

Experimental Data Physical Chemistry Analytical Chemistry Inorganic Chemistry Organic Chemistry 
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.

Symbols

B

total concentration of Cu(II)

Baq

total concentration of Cu(II) in the aqueous phase

b

concentration of free Cu2+

H

analytical excess of H+

h

concentration of free H+

A

total concentration of ligand

a

concentration of free ligand

q

Borg/Baq, distribution ratio between organic and aqueous phases

Ox

andAF indicate 8-hydroxyquinolinate and o-aminophenolate, resp.,L indicates a ligand. Charges are omitted

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References

  1. 1.
    A. E. Martell andL. G. Sillén, Stability Constants, Special Publication No. 17 and Special Publication No. 25, The Chemical Society, London (1964 and 1971).Google Scholar
  2. 2.
    R. Näsänen andU. Penttinen, Acta Chem. Scand.6, 837 (1952).Google Scholar
  3. 3.
    A. Albert, Biochem. J.54, 646 (1953).Google Scholar
  4. 4.
    J. Fresco andH. Freiser, Analyt. Chem.36, 631 (1964).Google Scholar
  5. 5.
    E. Bottari, A. Liberti, andA. Rufolo, J. inorg. nucl. Chem.30, 2173 (1968).Google Scholar
  6. 6.
    E. Bottari andA. Rufolo, Mh. Chem.99, 2383 (1968).Google Scholar
  7. 7.
    C. Berecki-Biedermann, Ark. Kemi9, 175 (1956).Google Scholar
  8. 8.
    E. Bottari, Mh. Chem.105, 187 (1974).Google Scholar
  9. 9.
    L. G. Sillén, Acta Chem. Scand.10, 186 (1956).Google Scholar
  10. 10.
    J. Rydberg, Svensk Kem. Tidskr.65, 37 (1953).Google Scholar
  11. 11.
    D. Dyrssen, Svensk Kem. Tidskr.64, 213 (1952).Google Scholar

Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • Emilio Bottari
    • 1
  • Giancarlo Goretti
    • 1
  1. 1.Istituto di Chimica AnaliticaCittá UniversitariaRomaItalia

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