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Type: Artigo de periódico
Title: Kinetics And Mechanisms Of Dissociation Of Tris(2,2′-bipyridine)iron(ii) Complex In Aqueous Salts Solutions
Author: Tubino M.
Vichi E.J.S.
Abstract: The pseudo first order rate of acid hydrolysis of the complex cation Fe(bipy)3 2+, has been determined in aqueous solutions of varying concentrations of LiCl, NaCl, KCl, Nh4Cl, NaBr, KBr, NH4Br, MgCl2, CaCl2, SrCl2, BaCl2, and MgBr2 at 20.0, 25.0, and 30.0 °C in the presence of 0.012 mol kg-1 HCl, to avoid reformation of the complex. The rate rises with the salt concentration, reaching a maximum at ca. 0.5 to 1 mol kg-1 in chloride and ca. 0.3 mol kg-1 for bromide. Afterwards a linear decrease occurs with different slopes, which depends on the cation and anion involved. These trends are ascribed to the removal of water molecules from the bulk solvent by incorporation in the hydration shells of the cations of the salts and to ion-pair formation. © 1987.
Rights: fechado
Identifier DOI: 10.1016/S0020-1693(00)96021-3
Date Issue: 1987
Appears in Collections:Unicamp - Artigos e Outros Documentos

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