Spectrophootometric Studies of Acidity Constant and Cu2+ Ion Complexation of 1-Hydroxy-2-(prop-2'-enyl)-4-(prop-2'-enyloxy)-9,10-anthraquinone in Methanol-Water Mixtures

• Autorzy: Shamsipur M. , Avanes A. , Aghapour G. , Sharghi H.
• Języki publikacji: EN

Abstrakty

EN

The acidity constant of 1-hydroxy-2-(prop-2_-enyl)-4-(prop-2_-enyloxy)-9,10-anthraquinone in different methanol-water mixtures at 25_C has been determined spectrophotometrically. A linear reverse relationship is observed between the pKa and mole fraction of methanol in the solvent mixtures. The complexation reaction between the anthraquinone derivative used and Cu2+ ion has been studied in methanol solution at 25_C by a spectrophotometric technique. The stoichiometry of the resulting complex was found to be 1:1. The formation constant of the Cu2+-anthraquinone complex, evaluated from the computer fitting of the absorbance-mole ratio data at 5 different wavelengths, is log Kf = 4.59 _ 0.06.

Słowa kluczowe

EN

9,10-anthraquinone derivative; pKa; Cu2+ complex; stability; methanol-water; spectrophotometry

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2001
• Tom: Vol. 75, nr 10
• Strony: 1533--1541
• Opis fizyczny: Bibliogr. 42 poz., rys.

Twórcy

autor

Shamsipur M.

• Department of Chemistry, Razi University, Kermanshah, Iran

autor

Avanes A.

• Department of Chemistry, Tarbiat Moallem University, Tehran, Iran

autor

Aghapour G.

• Department of Chemistry, Shiraz University, Shiraz, Iran

autor

Sharghi H.

• Department of Chemistry, Shiraz University, Shiraz, Iran

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