Electrochemical Behavior of some Thioheterocyclic Compounds in Aqueous-Methanolic Media at Mercury Electrodes

• Autorzy: Fotouhi L. , Sadeghi R.
• Języki publikacji: EN

Abstrakty

EN

This paper presents the electrochemical behavior of 4-amino-3-thio-1,2,4-triazole (I), 4-amino-3-thio-5-methyl-1,2,4-triazole (II) and 4-amino-6-methyl-3-thio-1,2,4-triazin- 5-one (III) at mercury electrodes. The study is performed in aqueous-methanolic solutions by differential pulse polarography (DPP), cyclic voltammetry (CV), chronoamperometry, coulometry and spectrophotometry. All three compounds exhibited one reversible oxidation peak, accompanied by a prepeak, due to the adsorption of these compounds on the electrode. The main peak in each case was found to be diffusion controlled. Their polarographic responses were similar to those of common thiol compounds and involved a one electron oxidation of mercury followed by a disproportionation step to form the mercury(II) salt and Hg, (EC mechanism). The protonation constants (pK), diffusion constants, the rate constants of coupled chemical reaction and transfer coefficients were also obtained.

Słowa kluczowe

EN

oxidation; triazole; triazine; polarography; cyclic voltammetry

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 10
• Strony: 1313--1321
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Fotouhi L.

• Department of Chemistry, Faculty of Science, Alzahra University, P.O.Box 1993891176, Tehran, Iran

autor

Sadeghi R.

• Department of Chemistry, Faculty of Science, Alzahra University, P.O.Box 1993891176, Tehran, Iran

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