Competitive Potentiometric study of a Series of 18-Crown-6 with Pb2+, Ag+, and Tl+ Ions in Methanol Using Ag+/Ag Electrode

• Autorzy: Zolgarnein J. , Azimi G. , Habibi M.
• Języki publikacji: EN

Abstrakty

EN

The complexation of Ag+, Tl+ and Pb2+ with 18-crown-6 (18C6), dibenzo-18-crown-6 (DB18C6), dicyclohexyl-18-crown-6 (DCY18C6), and dibenzopyridino-18-crown-6 (DBPY18C6) in methanol solution have been studied by a competitive potentiometry, using Ag+/Ag electrode as a sensor. The stoichiometry and stability constants of resulting complexes have been evaluated by MINIQUAD program. The stoichiometry for all resulting complexes was 1:1. The order of stability of Ag+ complexes with used crown ethers varied as DBPY18C6 > DCY18C6 > 18C6 > DB18C6. For Pb2+, and Tl+ , the sequence of stability of complexes with each of these crown ethers (except of DBPY18C6) varied in the order Pb2+>Ag+>Tl+ . The major trend of stability of resulting complexes of these macrocycle with Pb2+ and Tl+ varied in the order DCY18C6 > 18C6 > DBPY18C6 > DB18C6 with few exceptions.

Słowa kluczowe

EN

competitive potentiometry; Ag+/Ag electrode; dibenzopyridino-18-crown-6; stability constants

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2004
• Tom: Vol. 78 / nr 6
• Strony: 795--802
• Opis fizyczny: Bibliogr. 28 poz., rys

Twórcy

autor

Zolgarnein J.

• Department of Chemistry, Arak University, Arak, Iran

autor

Azimi G.

• Department of Chemistry, Arak University, Arak, Iran

autor

Habibi M.

• Department of Chemistry, Arak University, Arak, Iran

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