| Autor: |
Aihara, Makoto, Misumi, Seizo |
| Zdroj: |
Bulletin of the Chemical Society of Japan; February 1975, Vol. 48 Issue: 2 p684-686, 3p |
| Abstrakt: |
Studies were carried out on the polarographic behavior of europium in acetonitrile in the presence of SCN-, Br-, I-and Cl-. Two reduction waves were found in the Eu(III)–SCN-system, one corresponding to the reduction of [Eu(NCS)6]3-and the other to the reduction of [Eu(NCS)2]. In the Eu(III)–Br-system, the reduction potential of Eu(III)–bromide complex species was more positive than that of the [HgBr4]2-/Hg couple. In the Eu(III)–I-system, iodide ions were oxidized in acetonitrile by europium(III). The formation constants of Eu(III)–SCN-system were found to be: logß6=24.4 for [Eu(NCS)6]3-and logß2=6.0 for [Eu(NCS)2. The degree of complexation of europium(III) and mercury(II) with bromide ion was also determined. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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