Skip to main content
SpringerLink
Log in

Ligand exchange reactions of some Cr(III) complexes investigated by cyclic voltammetry

Untersuchung von Ligandenaustauschreaktionen einiger Cr(III)-Komplexe mittels cyclischer Voltammetrie

  • Anorganische, Struktur- und Physikalische Chemie
  • Published:
Monatshefte für Chemie - Chemical Monthly Aims and scope Submit manuscript

Abstract

From cyclic linear sweep voltammograms of some Cr(III) complexes it is evident that after electron transfer ligand groups are expelled relatively slowly inDMSO and the tetra coordinated complex is formed. The rate constants could be determined in some cases by the methods of cyclic voltammetry. The following compounds were examined: [Cr(en)3]3+, [Cr(acac)(en)2]2+, [Cr(acac)3]. [Cr(dien)2]3+, [Cr(DMSO)6]3+, [Cr(ur)6]3+. For [Cr(en)3]3+ the energy of activation could be determined as well.

The dependence of the velocity of ligand elimination on complex structure is discussed.

Zusammenfassung

Bei der Reduktion einiger der folgenden Cr(III)-Komplexe inDMSO läßt sich auf Grund der Voltammogramme auf eine Ligandenabspaltung und Bildung der vierfach koordinierten Cr(II)-Komplexe schließen: [Cr(en)3]3+, [Cr(acac)(en)2]2+, [Cr(acac)3], [Cr(dien)2]3+, [Cr(DMSO)6]3+, [Cr(ur)6]3+. Für das [Cr(en)3]3+ konnten Geschwindigkeitskonstante und Aktivierungsenergie dieser nachgelagerten Reaktion bestimmt werden.

Der Einfluß der Struktur des Komplexes auf die Zerfallsgeschwindigkeit wird diskutiert.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. A. Earnshaw, J. Chem. Soc.A 1969, 1339.

  2. N. Maki, J. Inorg. Nucl. Chem.37, 1207 (1975).

    Article  CAS  Google Scholar 

  3. Compare also papers byG. Hills andL. Peter and byYu. M. Povarov presented at the 28th meeting of ISE at Varna on Sept. 23, 1977.

  4. M. Linhard, Z. Electrochem.50, 224 (1944).

    CAS  Google Scholar 

  5. W. C. Fernelius andJ. E. Blanche, in:T. Moeller, Inorg. Synth.5, 130 (1957).

  6. M. Linhard andM. Weigel, Z. anorg. allg. Chem.271, 351 (1930).

    Google Scholar 

  7. P. A. House andC. S. Garner, Inorg. Chem.5, 840 (1966).

    Article  CAS  Google Scholar 

  8. H. L. Schäfer andH. Opitz, Z. anorg. allg. Chem.313, 178 (1961).

    Article  Google Scholar 

  9. F. A. Cotton andR. Francis, J. Amer. Chem. Soc.82, 2986 (1960).

    Article  CAS  Google Scholar 

  10. E. Wilke-Dörfurth andK. Niederer, Z. anorg. allg. Chem.184, 145 (1929).

    Article  Google Scholar 

  11. R. S. Nicholson andI. Shain, Anal. Chem.36, 706 (1964).

    Article  CAS  Google Scholar 

  12. R. S. Nicholson, Anal. Chem.38, 1406 (1966).

    Article  CAS  Google Scholar 

  13. R. S. Nicholson, Anal. Chem.37, 1351 (1965).

    Article  CAS  Google Scholar 

  14. T. W. Swaddle, Coord. Chem. Rev.14, 217 (1974).

    Article  CAS  Google Scholar 

  15. A. Earnshaw, L. S. Arkworthy, andK. C. Patel, J. Chem. Soc.A 1969, 2276.

Download references

Author information

Authors and Affiliations

  1. Sektion Chemie Humboldt-Universität zu Berlin, DDR-108, Berlin, Deutsche Demokratische Republik

    R. Landsberg & P. Janietz

  2. Sektion NGW der Humboldt-Universität zu Berlin, Bereich Gärungstechnologie, DDR-104, Berlin, Deutsche Demokratische Republik

    M. Prügel

Authors
  1. R. Landsberg
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. P. Janietz
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. M. Prügel
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Landsberg, R., Janietz, P. & Prügel, M. Ligand exchange reactions of some Cr(III) complexes investigated by cyclic voltammetry. Monatshefte für Chemie 109, 1287–1294 (1978). https://doi.org/10.1007/BF00906040

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00906040

Keywords

Search

Navigation