Micellar effects on a ligand substitution reaction: Kinetics of the formation of [Fe(CN)5(μ‐pz)Ru(NH3)5]−, from [Fe(CN)5H2O]3− and [Ru(NH3)5pz]2+, in the presence of anionic micelles |
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| Authors: | Rafael Jim nez,Elena Bueno,Israel Cano,Elizabeth Corbacho,M. Eugenia Fern ndez,Lidia G mez,Jesú s Graciani,Marí a Hern ndez,M. Teresa Matitos,Jos Ortí z,Pilar L pez‐Cornejo,Rafael Prado‐Gotor |
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| Affiliation: | Rafael Jiménez,Elena Bueno,Israel Cano,Elizabeth Corbacho,M. Eugenia Fernández,Lidia Gómez,Jesús Graciani,María Hernández,M. Teresa Matitos,José Ortíz,Pilar López‐Cornejo,Rafael Prado‐Gotor |
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| Abstract: | The kinetics of substitution of H2O by Ru(NH3)5pz2+ (pz = pyrazine) in Fe(CN)5H2O3? have been studied in micellar aqueous solutions of sodium dodecylsulfate (SDS). Experimental results are discussed by using an approach based on the transition‐state theory. This approach is better than others based on the pseudophase model, which can also be used, because it is able to give a clear meaning to the parameters of the model. Trends in the observed reactivity are explained by a change in the degree of association of one of the reactants to the micelles (Ru(NH3)5pz2+ in the present work). This association is governed by an equilibrium constant that depends on the electrostatic potential at the surface of the micelles. © 2004 Wiley Periodicals, Inc. Int J Chem Kinet 36: 627–633, 2004 |
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