Abstract
Much enhanced acid catalysis was observed in oxygen atom transfer (OAT) reactions by a mononuclear nonheme Cr(III)-superoxo complex, [(Cl)(TMC)Cr III (O 2 )] + (1), in the presence of triflic acid. In the acid-catalyzed reactions, the reactivity of 1 in OAT of thioanisole was enhanced significantly, showing more than 10 4 -fold acceleration in rate. Electron transfer (ET) from electron donors to 1 also occurred only in the presence of HOTf. The enhanced reactivity of 1 by HOTf was explained by proton-coupled electron transfer from electron donors, such as ferrocene, to 1 in light of the Marcus theory of ET. The present study reports for the first time the dramatic proton effect on the chemical properties of metal-superoxo species.
| Original language | English |
|---|---|
| Pages (from-to) | 8372-8375 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 140 |
| Issue number | 27 |
| DOIs | |
| State | Published - 11 Jul 2018 |
Bibliographical note
Publisher Copyright:© 2018 American Chemical Society.
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