Aromatic hydroxylation of anthracene derivatives by a chromium(iii)-superoxo complex via proton-coupled electron transfer

被引：3

作者：

Devi, Tarali ^{[1
]}

Lee, Yong-Min ^{[1
]}

Nam, Wonwoo ^{[1
]}

Fukuzumi, Shunichi ^{[1
,2
]}

机构：

[1] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 03760, South Korea

[2] Meijo Univ, Fac Sci & Engn, Nagoya, Aichi 4688502, Japan

来源：

CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 57期

基金：

日本科学技术振兴机构;

关键词：

MONONUCLEAR NONHEME IRON; OXYGEN-ATOM TRANSFER; C-H ACTIVATION; MULTIELECTRON OXIDATION; IRON(IV)-OXO COMPLEX; DIOXYGEN ACTIVATION; METAL-OXO; REACTIVITY; COPPER; MODEL;

D O I：

10.1039/c9cc03245b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The chemistry of metal-superoxo intermediates started being unveiled in oxidation reactions by enzymes and their synthetic model compounds. However, aromatic hydroxylation reactions by the metal-superoxo species are yet to be demonstrated. In this study, we report for the first time that the hydroxylation of aromatic compounds such as anthracene and its derivatives by a mononuclear nonheme Cr(iii)-superoxo complex, [(Cl)(TMC)Cr-III(O-2)](+) (1), occurs in the presence of triflic acid (HOTf) via the rate-determining proton-coupled electron transfer (PCET) from anthracene to 1, followed by a fast further oxidation to give anthraquinone. The rate constants of electron transfer from anthracene derivatives to 1 in the presence of HOTf are well analyzed in light of the Marcus theory of electron transfer.

引用

页码：8286 / 8289

页数：4

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