Hydrophobic interaction effects on the kinetics of ligand substitution in binary aqueous mixtures at pentacyano(piperidine)ferrate(II) ion |
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| Authors: | Julio A Salas Miguel Katz Nestor E Katz |
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| Institution: | 1. Cátedra de Físico-Química, Instituto de Ingeniería Quimica, Faculatad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán, Tucumán, Argentina
2. Catedra de Fisicoquímica Ill, Instituto de Quimíca Fisíca, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, 491, (4000), Ayacucho, Argentina
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| Abstract: | The kinetics of piperidine replacement by pyridine at the pentacyano(piperidine)-ferrate(II) complex ion was studied under pseudo-first order conditions in binary aqueous mixtures of methanol, t-butanol, p-dioxane, and glycerol, from a mole fraction of co-solvent from 0 to about 0.15. The observed variations can be explained considering the degree of hydrophobic interaction between released ligand and water molecules which changes according to the structure-forming or struucture-breaking effect of added co-solvent on water. |
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