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Reduction potentials and kinetics of beta-fragmentation reactions of 4-substituted benzoylthiyl radicals
KTH, Superseded Departments, Chemistry.
KTH, Superseded Departments, Chemistry.
KTH, Superseded Departments, Chemistry.ORCID iD: 0000-0003-0663-0751
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2000 (English)In: Journal of Physical Chemistry A, ISSN 1089-5639, E-ISSN 1520-5215, Vol. 104, no 37, 8524-8526 p.Article in journal (Refereed) Published
Abstract [en]

By means of pulse radiolysis, the one-electron reduction potentials of 4-substituted benzoylthiolates E degrees(4-XPhC(O)S-./4-XPhC(O)S-), where X is CH3, CH3O, CF3, and CN, were measured in aqueous solutions. The kinetics of beta-fragmentation reactions of the 4-XPhC(O)S-. radicals to form the corresponding 4-XPh. radicals and COS (i.e., 4-XPhC(O)S-. --> 4-XPh. + COS) were also determined. The pK(a)s of the corresponding acids (4-XPhC(O)SH) were measured by a spectrophotometric method. Thus, the values of E degrees(4-XPhC(O)S-., H+/ 4-XPhC(O)SH) and the S-H bond strength of the 4-XPhC(O)S-H were calculated. The substituent effects on the redox potential, the pK(a), and the kinetics of their beta-fragmentation reactions were examined.

Place, publisher, year, edition, pages
2000. Vol. 104, no 37, 8524-8526 p.
Keyword [en]
electron, chemistry, acids
Identifiers
URN: urn:nbn:se:kth:diva-20043ISI: 000089383400011OAI: oai:DiVA.org:kth-20043DiVA: diva2:338736
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Jonsson, Mats

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