Dioxygen activation by a low-valent cobalt complex employing a flexible tripodal N-heterocyclic carbene ligand

被引：131

作者：

Hu, XL ^{[1
]}

Castro-Rodriguez, I ^{[1
]}

Meyer, K ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 41期

关键词：

D O I：

10.1021/ja046048k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The novel versatile cobalt(I) tris-carbene complex [(TIMENxyl)Co]Cl (1) (where TIMEN = (tris[2(3-arylimidazol-2-ylidene)ethyl]amine) reacts with CO, one-electron oxidizers such as CH2Cl2, and O-2 to yield the cobalt complexes [(TIMENxyl)Co(CO)]Cl (2), [(TIMENxyl)Co(Cl)]Cl (3), and peroxo species [(TIMENxyl)Co(O-2)](BPh4) (5). All new complexes were fully characterized by H-1 NMR, UV/vis, and IR spectroscopy as well as superconducting quantum interference device (SQUID) magnetization measurements and single-crystal X-ray crystallography. The nucleophilic character of the eta(2) -bound dioxygen ligand in 5 was confirmed by density functional theory (DFT) studies and allows for oxygen-transfer reactions with electron-deficient organic substrates, such as benzoyl chloride.

引用

页码：13464 / 13473

页数：10

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