<P>Much enhanced acid catalysis was observed in oxygen atom transfer (OAT) reactions by a mononuclear nonheme Cr(III)-superoxo complex, [(Cl)(TMC)Cr<SUP>III</SUP>(O<SUB>2</SUB>)]<SUP>+</SUP> (<B>1</B&...
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https://www.riss.kr/link?id=A107450802
2018
-
SCOPUS,SCIE
학술저널
8372-8375(4쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>Much enhanced acid catalysis was observed in oxygen atom transfer (OAT) reactions by a mononuclear nonheme Cr(III)-superoxo complex, [(Cl)(TMC)Cr<SUP>III</SUP>(O<SUB>2</SUB>)]<SUP>+</SUP> (<B>1</B&...
<P>Much enhanced acid catalysis was observed in oxygen atom transfer (OAT) reactions by a mononuclear nonheme Cr(III)-superoxo complex, [(Cl)(TMC)Cr<SUP>III</SUP>(O<SUB>2</SUB>)]<SUP>+</SUP> (<B>1</B>), in the presence of triflic acid. In the acid-catalyzed reactions, the reactivity of <B>1</B> in OAT of thioanisole was enhanced significantly, showing more than 10<SUP>4</SUP>-fold acceleration in rate. Electron transfer (ET) from electron donors to <B>1</B> also occurred only in the presence of HOTf. The enhanced reactivity of <B>1</B> by HOTf was explained by proton-coupled electron transfer from electron donors, such as ferrocene, to <B>1</B> 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.</P>
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