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Monothiocyanatoiron(III) Complex in Dichloromethane–Methanol Solvent Mixture

Branka Mihaljević ; Ruđer Bošković Institute, Bijenička 54, P.O. Box 180, 10000 Zagreb, Croatia
Dušan Ražem ; Ruđer Bošković Institute, Bijenička 54, P.O. Box 180, 10000 Zagreb, Croatia

Puni tekst: engleski, pdf (238 KB) str. 249-255 preuzimanja: 603* citiraj
APA 6th Edition
Mihaljević, B. i Ražem, D. (2003). Monothiocyanatoiron(III) Complex in Dichloromethane–Methanol Solvent Mixture. Croatica Chemica Acta, 76 (3), 249-255. Preuzeto s https://hrcak.srce.hr/103175
MLA 8th Edition
Mihaljević, Branka i Dušan Ražem. "Monothiocyanatoiron(III) Complex in Dichloromethane–Methanol Solvent Mixture." Croatica Chemica Acta, vol. 76, br. 3, 2003, str. 249-255. https://hrcak.srce.hr/103175. Citirano 04.03.2021.
Chicago 17th Edition
Mihaljević, Branka i Dušan Ražem. "Monothiocyanatoiron(III) Complex in Dichloromethane–Methanol Solvent Mixture." Croatica Chemica Acta 76, br. 3 (2003): 249-255. https://hrcak.srce.hr/103175
Harvard
Mihaljević, B., i Ražem, D. (2003). 'Monothiocyanatoiron(III) Complex in Dichloromethane–Methanol Solvent Mixture', Croatica Chemica Acta, 76(3), str. 249-255. Preuzeto s: https://hrcak.srce.hr/103175 (Datum pristupa: 04.03.2021.)
Vancouver
Mihaljević B, Ražem D. Monothiocyanatoiron(III) Complex in Dichloromethane–Methanol Solvent Mixture. Croatica Chemica Acta [Internet]. 2003 [pristupljeno 04.03.2021.];76(3):249-255. Dostupno na: https://hrcak.srce.hr/103175
IEEE
B. Mihaljević i D. Ražem, "Monothiocyanatoiron(III) Complex in Dichloromethane–Methanol Solvent Mixture", Croatica Chemica Acta, vol.76, br. 3, str. 249-255, 2003. [Online]. Dostupno na: https://hrcak.srce.hr/103175. [Citirano: 04.03.2021.]

Sažetak
Complexation of FeIII ion with thiocyanate in dichloromethane–methanol solvent mixture was studied because of our interest in the analytical uses of FeII-to-FeIII transformations in non-aqueous media. Molar absorptivity and composition of the complex, as well as the solvolysis constant and the stability constant of the complex as a function of the solution composition were determined by spectrophotometry. The composition of the complex throughout the solubility range of the components was that of a monocomplex, [FeNCS]2+. In highly acidic solutions, molar absorptivity of the complex was not influenced by acid concentration and was (13 700 ± 700) dm3 mol-1 cm-1. The solvolysis constant was similar to the value in water, Ks = 7.0 × 10-3 mol dm-3. The stability constant of the complex, on the other hand, was strongly influenced by acid concentration. Extrapolation to the infinite acid concentration yielded the stability constant 40 500 dm3 mol-1, which is adequate for analytical uses of the complex in non-aqueous media.

Ključne riječi
iron(III); thiocyanate; thiocyanatoiron(III) complex; stability constant; spectrophotometry; non-aqueous medium

Hrčak ID: 103175

URI
https://hrcak.srce.hr/103175

Posjeta: 853 *