Spectroscopic and computational characterization of CuII-OOR (R = H or cumyl) complexes bearing a Me6-tren ligand.

Spectroscopic and computational characterization of CuII-OOR (R = H or cumyl) complexes bearing a Me6-tren ligand.
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DOI:
10.1039/c0dt01036g
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发表时间:
2011-03-14
期刊:
Dalton transactions (Cambridge, England : 2003)
影响因子:
--
通讯作者:
Nam W
Nam W
中科院分区:
其他
文献类型:
--
作者:
Choi YJ;Cho KB;Kubo M;Ogura T;Karlin KD;Cho J;Nam W

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通过[Cu(Me 6-tren)(CH 3CN)]2+(1)分别与H2 O2和枯基-OOH在三乙胺存在下反应,合成了铜(II)-过氧化氢配合物[Cu(Me 6-tren)(OOH)]+(2)和铜(II)-枯基过氧化氢配合物[Cu(Me 6-tren)(OOC(CH 3)2 Ph)]+(3)。这些中间体,2和3,成功地通过各种物理化学方法,如UV-vis,ESI-MS,共振拉曼和EPR光谱,使我们提出的结构的Cu(II)-OOR物种与三角双锥几何形状。密度泛函理论(DFT)计算提供的几何和电子配置2和3,显示三角双锥铜(II)-OOR几何形状。这些铜(II)-hydroperoxo和-cumylperoxo配合物在亲电和亲核氧化反应中是不活跃的。
A copper(II)–hydroperoxo complex, [Cu(Me6-tren)(OOH)]+ (2), and a copper(II)–cumylperoxo complex, [Cu(Me6-tren)(OOC(CH3)2Ph)]+ (3), were synthesized by reacting [Cu(Me6-tren)(CH3CN)]2+ (1) with H2O2 and cumyl-OOH, respectively, in the presence of triethylamine. These intermediates, 2 and 3, were successfully characterized by various physicochemical methods such as UV-vis, ESI-MS, resonance Raman and EPR spectroscopies, leading us to propose structures of the Cu(II)–OOR species with a trigonal-bipyramidal geometry. Density functional theory (DFT) calculations provided geometric and electronic configurations of 2 and 3, showing trigonal bipyramidal copper(II)–OOR geometries. These copper(II)–hydroperoxo and –cumylperoxo complexes were inactive in electrophilic and nucleophilic oxidation reactions.
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