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Study of the Reaction Fe(CN)5(4-CNpy)3- + CN- in AOT-Oil-Water Microemulsions

✍ Scribed by Pilar López; Amalia Rodrı́guez; Carlos Gómez-Herrera; Francisco Sánchez; Marı́a Luisa Moyá

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
269 KB
Volume
159
Category
Article
ISSN
0021-9797

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✦ Synopsis

The ligand substitution process (\mathrm{Fe}(\mathrm{CN}){5}(4-\mathrm{CNpy})^{3-}+\mathrm{CN}^{-}) (4-CNpy is 4-cyanopyridine) has been studied in various AOT (sodium bis(2-ethylhexyl) sulphosuccinate)-oil-water microemulsions at (298.2 \mathrm{~K}) (oil = heptane, octane, iso-octane, nonane, decane, undecane, and dodecane). Limiting rate constant values for this reaction show no dependence on surfactant concentration and on the nature of the oil phase at constant molar ratio (w=\left[\mathrm{H}{2} \mathrm{O}\right] /[\mathrm{AOT}]). For (w \leqslant 20), a decrease in the amount of water present in the system brings about a decrease in the reaction rate. Results are explained by taking into account previous kinetic studies in similar water-in-oil microemulsions. Q 1993 Academic Press, Inc.

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