Oxidation of organic sulfides by peroxyl radicals; search for an adduct intermediate

• Autorzy: Bonifacic M. , Stefanic I.
• Konferencja: Reactive Intermediates in Sulfur Chemistry Workshop dedicated to Professor Klaus-Dieter Asmus on His 60th birthday August 23-26, 1998, Poznan, Poland
• Języki publikacji: EN

Abstrakty

EN

The reaction mechanism of dimethyl sulfide oxidation by peroxyl radicals (CCl3OOź and CHCl2OOź) in aqueous/alcohol solutions has been studied by means of pulse radiolysis with optical detection in order to gain evidence for the formation of an adduct intermediate, ROO-źS(CH3)2. In the range of 300-650 nm, the only absorbing product was the one-electron oxidized species [(CH3)2S\S(CH3)2]+, and no indication of an additional absorption attributable to an adduct precursor was found. Under the condition of only 50% conversion of CHCl2OOź into the sulfide radical cation, however, addition of a small amount of I- resulted in formation of (CH3)2S\I as the only product and at a yield equal to that of CHCl2OOź radicals. This result is explained by the reaction of iodide ions with a precursor of [(CH3)2S\S(CH3)2]+ species, namely, the adduct CHCl2OO-źS(CH3)2 and is, thus, taken as conclusive, although indirect, evidence of the existence of this adduct intermediate.

Słowa kluczowe

EN

carbon tetrachloride; dimethyl sulfide; iodide; peroxyl radicals; pulse radiolysis; two-electron oxidation

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2000
• Tom: Vol. 45, nr 1
• Strony: 39--44
• Opis fizyczny: Bibliogr. 34 poz., rys.

Twórcy

autor

Bonifacic M.

autor

Stefanic I.

• Ruder Boskovic Institute, Department of Physical Chemistry, Bijenicka c. 54, 10000 Zagreb, Croatia