title: Specific Anion Effects on the Kinetics of Iodination of Acetone.
abstract: Specific ion effects on the kinetics of iodination of acetone in an acidic medium are investigated by UV/Vis spectrophotometry as a function of nature of the acid and temperature. The results indicate that the order of the reaction with respect to acetone is practically unaffected by the composition of the acid while the value of the mixed constant k1 K increases according to the sequence HBr<HCl<HClO4 <HF<H2 SO4 <H3 PO4 . The results are discussed in terms of the hydration free energy and size of the anion and of the interaction between the cationic intermediate and the anion.
authors.affiliation: Department of Chemistry & CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino (Firenze), Italy. PLN@csgi.unifi.it.
authors.forename: Pierandrea
authors.identifier: http://orcid.org/0000-0003-4647-0369
authors.initials: P
authors.lastname: Lo Nostro
authors.affiliation: Department of Chemistry & CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino (Firenze), Italy.|Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, ACT, 0200, Australia.
authors.forename: Virginia
authors.identifier: http://orcid.org/0000-0003-0929-954X
authors.initials: V
authors.lastname: Mazzini
authors.affiliation: Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, ACT, 0200, Australia.
authors.forename: Barry W
authors.initials: BW
authors.lastname: Ninham
authors.affiliation: Department of Chemistry & CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino (Firenze), Italy.
authors.forename: Moira
authors.identifier: http://orcid.org/0000-0002-5103-1339
authors.initials: M
authors.lastname: Ambrosi
authors.affiliation: Department of Chemistry & CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino (Firenze), Italy.
authors.forename: Luigi
authors.identifier: http://orcid.org/0000-0002-1654-3603
authors.initials: L
authors.lastname: Dei
authors.affiliation: Department of Chemistry & CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino (Firenze), Italy.
authors.forename: Piero
authors.initials: P
authors.lastname: Baglioni
keywords: Hofmeister series; chemical kinetics; iodination; specific ion effects; transition state theory