| Autor: |
Solomoichenko, T., Sadovskii, Yu., Prokop’eva, T., Karpichev, E., Kapitanov, I., Piskunova, Zh., Savelova, V., Popov, A. |
| Předmět: |
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| Zdroj: |
Theoretical & Experimental Chemistry; Nov2006, Vol. 42 Issue 6, p364-370, 7p, 2 Charts, 2 Graphs |
| Abstrakt: |
We have studied the nucleophilicity of the hydroperoxide anion relative to 4-nitrophenyl diethyl phosphonate (NPDEPS) in the presence of cetyltrimethylammonium bromide (water, 25 °C) while varying the acidity of the medium and the hydroperoxide anion concentration over a broad range. The increase in the reaction rate when the reaction is transferred to a micellar pseudophase is as high as ∼10-fold, which is explained by concentration effects. In CTAB micelles, as in water, the hydroperoxide ion is one of the most effective α-nucleophiles, and the size of the α-effect, characterized by the ratio of the second-order rate constants for reactions of HOO− and OH− anions with NPDEPS, remains practically constant and reaches a value of ∼50-fold. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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