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dc.date.accessioned 2023-10-26T12:24:16Z
dc.date.available 2023-10-26T12:24:16Z
dc.date.issued 2007
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/159380
dc.description.abstract The kinetics of the oxidation of pyridine, 3-chloropyridine, 3-cyanopyridine, 3-methoxypyridine and 3-methylpyridine mediated by SO₄; radicals are studied by flash photolysis of peroxodisulphate, S₂O₈²⁻−, at pH 2.5 and 9. The absolute rate constants for the reactions of both, the basic and acid forms of the pyridines, are determined and discussed in terms of the Hammett correlation. The monosubstituted pyridines react about 10 times faster with sulphate radicals than their protonated forms, the pyridine ions. The organic intermediates are identified as the corresponding hydroxypyridine radical adducts and their absorption spectra compared with those estimated employing the time-dependent density functional theory with explicit account for bulk solvent effects. A reaction mechanism which accounts for the observed intermediates and the pyridinols formed as products is proposed. en
dc.format.extent 2498-2505 es
dc.language en es
dc.subject kinetics es
dc.subject oxidation es
dc.subject pyridine es
dc.subject flash photolysis es
dc.title Reactions of sulphate radicals with substituted pyridines: a structure–reactivity correlation analysis en
dc.type Articulo es
sedici.identifier.other https://doi.org/10.1002/cphc.200700456 es
sedici.identifier.issn 1439-4235 es
sedici.identifier.issn 1439-7641 es
sedici.creator.person Dell'Arciprete, María Laura es
sedici.creator.person Cobos, Carlos Jorge es
sedici.creator.person Furlong, Jorge Javier Pedro es
sedici.creator.person Mártire, Daniel Osvaldo es
sedici.creator.person González, Mónica Cristina es
sedici.subject.materias Química es
sedici.description.fulltext true es
mods.originInfo.place Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas es
mods.originInfo.place Laboratorio de Estudio de Compuestos Orgánicos es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle ChemPhysChem es
sedici.relation.journalVolumeAndIssue vol. 8, no. 17 es

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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)