Cyclic Voltammetric Study of the Complexation of Pb2+ Ions by Dibenzopyridino-18-crown-6 in Some Nitriles

• Autorzy: Chojnacka-Kalinowska G. , Kalinowski M.
• Języki publikacji: EN

Abstrakty

EN

A cyclic voltammetric study of the interaction of Pb2+ ions with dibenzopyridino-18-crown-6 in acetonitrile, propionitrile, butyronitrile, benzyl cyanide and benzonitrile has been carried out at various temperatures. Stability constants of the resulting 1:1 complexes were found to decrease with increasing DN, the solvent donor number. The enthalpy and entropy of complexation were calculated from the temperature dependence of the stability constants; the complexes were enthalpy stabilized, but entropy destabilized in all the solvents under study. The relationships DeltaHo vs. DN and DeltaSo vs. DN were found.

Słowa kluczowe

EN

dibenzopyridino-18-crown-6; Pb2+; complexes; cyclic voltammetry; thermodynamics of complexation

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2004
• Tom: Vol. 78 / nr 9
• Strony: 1605--1610
• Opis fizyczny: Bibligr. 27 poz., rys.

Twórcy

autor

Chojnacka-Kalinowska G.

• Institute of Precision Mechanics, 3 Duchnicka str., 01-796 Warszawa, Poland

autor

Kalinowski M.

• Faculty of Chemistry, Warsaw University, 1 Pasteura str., 02-093 Warszawa, Poland

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