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Reduction potentials and kinetics of beta-fragmentation reactions of 4-substituted benzoylthiyl radicals
KTH, Tidigare Institutioner                               , Kemi.
KTH, Tidigare Institutioner                               , Kemi.
KTH, Tidigare Institutioner                               , Kemi.ORCID-id: 0000-0003-0663-0751
Vise andre og tillknytning
2000 (engelsk)Inngår i: Journal of Physical Chemistry A, ISSN 1089-5639, E-ISSN 1520-5215, Vol. 104, nr 37, s. 8524-8526Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2000. Vol. 104, nr 37, s. 8524-8526
Emneord [en]
electron, chemistry, acids
Identifikatorer
URN: urn:nbn:se:kth:diva-20043ISI: 000089383400011OAI: oai:DiVA.org:kth-20043DiVA, id: diva2:338736
Merknad
QC 20100525Tilgjengelig fra: 2010-08-10 Laget: 2010-08-10 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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