| Autor: |
Wada, Goro, Ohta, Youko, Hayashida, Sachiko, Sugino, Harumi, Mizui, Toyomi, Aihara, Yumiko |
| Zdroj: |
Bulletin of the Chemical Society of Japan; May 1980, Vol. 53 Issue: 5 p1278-1282, 5p |
| Abstrakt: |
The rate constants of the electron transfer reactions between Fe(II) and Fe(III) were determined in mixed solvents of water and alcohols, such as ethanol, 1-propanol, ethylene glycol, glycerol, and pentaerythritol. From the acid concentration dependence of the rate, the predominant path of the reaction was estimated to be Fe2+-Fe(OH)2+path with a rate constant kH. The rate constant kHincreases with increase in the mole fraction xof ethanol and 1-propanol, and decreases with increase in xof methanol, ethylene glycol, glycerol, and pentaerythritol. A straight line is obtained when In kHis plotted against the reciprocal dielectric constant D-1of the mixed solvents for the latter group of alcohols. From the slope of the straight line the distance between Fe2+and Fe(OH)2+is estimated to be 7.8 Å at the intermediate stage of the reaction. Therefore, the reaction is mostly controlled by the electrostatic repulsive force, being influenced by Dof the mixed solvents. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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