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Characteristic of the Ag(II)/Ag(I) system in the presence of 2,2′:6′,2″-terpyridine in acetonitrile

Charakteristik der Systeme Ag(II)/Ag(I) in Gegenwart von 2,2′:6′,2″-Terpyridin in Acetonitril

  • Anorganische Und Physikalische Chemie
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Monatshefte für Chemie / Chemical Monthly Aims and scope Submit manuscript

Summary

Composition of complexes of Ag(II) and Ag(I) ions with 2,2′:6′,2″-terpyridine (tp) have been established. It has been found that the Ag+ ion forms only one complex Ag(tp)+ withtp in acetonitrile; its conditional formation constant: β01=6.6·104 has been determined by the potentiometric method. Equilibria and redox systems formed in solutions due to the complexation of Ag+ and Ag2+ and oxidation of Ag(II) complexes are described. Their formal potentials have been found by coulometric and voltamperometric examinations. The presence of the Ag(tp) 3+2 ion in the anodic oxidized solutions of the complexes Ag(tp)(NO3)2 and Ag(tp)2(NO3)2 has been proved. Properties of the system Ag(II)/Ag(I) in the presence of terpyridine in water and in acetonitrile have been compared.

Zusammenfassung

Die Zusammensetzung der Komplexe von Ag(I)- und Ag(II)-Ionen mit 2,2′:6′,2″-Terpyridin (tp) wurde bestimmt. Das Ag+-Ion bildet mittp in Acetonitril nur einen Komplex-Ag(tp)+. Seine Konditionalbildungskonstante β01=6.6·104 wurde mit Hilfe der potentiometrischen Methode bestimmt. Es wurden die Gleichgewichte und Redoxsysteme als Resultat der Komplexbildung von Ag(II)- und Ag(I)-Ionen und der Ag(II)-Komplexoxidation charakterisiert und die Formalpotentiale mittels Voltametrie und Coulometrie bestimmt. Die Gegenwart der Ag(tp) 3+2 -Ionen wurde in anodisch oxydierten Lösungen der Komplexe Ag(tp)(NO3)2 und Ag(tp)2(NO3)2 nachgewiesen. Die Eigenschaften des Systems Ag(II)/Ag(I) in Gegenwart von 2,2′:6′,2″-Terpyridin in Wasser und in Acetonitril wurden verglichen.

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Ignaczak, M., Grzejdziak, A. & Degen-Piotrowska, E. Characteristic of the Ag(II)/Ag(I) system in the presence of 2,2′:6′,2″-terpyridine in acetonitrile. Monatsh Chem 120, 529–537 (1989). https://doi.org/10.1007/BF00810839

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  • DOI: https://doi.org/10.1007/BF00810839

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