Details
| Original language | English |
|---|---|
| Pages (from-to) | 2777-2780 |
| Number of pages | 4 |
| Journal | Journal of Physical Chemistry |
| Volume | 82 |
| Issue number | 26 |
| Publication status | Published - 1978 |
| Externally published | Yes |
Abstract
Addition reactions of molecular oxygen to organic sulfur radicals generally appear to be slower than to cor-responding carbon centered radicals. No reaction at all has been found to occur between O2 and the radical cations RSSR+·, R2S+·, and (R2S)2+·. The rate constant for the reaction of oxygen with the thiyl radicals from penicillamine k(PenS· + O2) = 4.0 × 107 M-1 s-1 has been determined from direct pulse radiolysis experiments, and k = 3.4 × 108, 7.8 × 108, and 2.3 × 108 M-1 s-1 have been evaluated by a competition method for the addition of O2 to C2H5S·, t-Bu-S·, and HOCH2CH2S·, respectively. Higher rate constants up to 109 M-1 s-1 were measured for the addition of O2 to mesomeric carbon-sulfur radical centers, 〉Ċ-S- ↔ 〉C=Ṡ-. The results are discussed in terms of other O2 addition reactions to various organic and inorganic radicals.
ASJC Scopus subject areas
- Engineering(all)
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of Physical Chemistry, Vol. 82, No. 26, 1978, p. 2777-2780.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Addition of oxygen to organic sulfur radicals
AU - Schäfer, K.
AU - Bonifačić, M.
AU - Bahnemann, D.
AU - Asmus, K. D.
N1 - Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1978
Y1 - 1978
N2 - Addition reactions of molecular oxygen to organic sulfur radicals generally appear to be slower than to cor-responding carbon centered radicals. No reaction at all has been found to occur between O2 and the radical cations RSSR+·, R2S+·, and (R2S)2+·. The rate constant for the reaction of oxygen with the thiyl radicals from penicillamine k(PenS· + O2) = 4.0 × 107 M-1 s-1 has been determined from direct pulse radiolysis experiments, and k = 3.4 × 108, 7.8 × 108, and 2.3 × 108 M-1 s-1 have been evaluated by a competition method for the addition of O2 to C2H5S·, t-Bu-S·, and HOCH2CH2S·, respectively. Higher rate constants up to 109 M-1 s-1 were measured for the addition of O2 to mesomeric carbon-sulfur radical centers, 〉Ċ-S- ↔ 〉C=Ṡ-. The results are discussed in terms of other O2 addition reactions to various organic and inorganic radicals.
AB - Addition reactions of molecular oxygen to organic sulfur radicals generally appear to be slower than to cor-responding carbon centered radicals. No reaction at all has been found to occur between O2 and the radical cations RSSR+·, R2S+·, and (R2S)2+·. The rate constant for the reaction of oxygen with the thiyl radicals from penicillamine k(PenS· + O2) = 4.0 × 107 M-1 s-1 has been determined from direct pulse radiolysis experiments, and k = 3.4 × 108, 7.8 × 108, and 2.3 × 108 M-1 s-1 have been evaluated by a competition method for the addition of O2 to C2H5S·, t-Bu-S·, and HOCH2CH2S·, respectively. Higher rate constants up to 109 M-1 s-1 were measured for the addition of O2 to mesomeric carbon-sulfur radical centers, 〉Ċ-S- ↔ 〉C=Ṡ-. The results are discussed in terms of other O2 addition reactions to various organic and inorganic radicals.
UR - http://www.scopus.com/inward/record.url?scp=0000783731&partnerID=8YFLogxK
U2 - 10.1021/j100515a005
DO - 10.1021/j100515a005
M3 - Article
AN - SCOPUS:0000783731
VL - 82
SP - 2777
EP - 2780
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
SN - 0022-3654
IS - 26
ER -