介绍了由三齿氧化还原活性配体支持的氢氧化铜配合物的电子转移系列的结构、光谱和反应性研究。单晶 X 射线晶体学显示,当配体处于三阴离子形式时,单核 [CuOH]1+ 核通过配体的 H 供体和氢氧根阴离子之间的分子内 H 键稳定。该复合物经历两个可逆氧化过程,产生两种亚稳态“高价”CuOH 物质,可通过添加化学计量量的 1e-氧化剂生成。这些 CuOH 物质的特征在于一系列光谱技术,包括 UV-vis 吸收、电子顺磁共振 (EPR) 和 X 射线吸收光谱 (XAS),它们共同表明所有氧化还原对都是配体定位的。
Hydrogen Atom Transfer by a High-Valent Nickel-Chloride Complex
作者:Prasenjit Mondal、Paolo Pirovano、Ankita Das、Erik R. Farquhar、Aidan R. McDonald
DOI:10.1021/jacs.7b11953
日期:2018.2.7
between the determined rate constants and substrate pKa, X-H bond dissociation energy, and oxidation potential, respectively, was performed. Through this analysis, we found that 2 reacted by a hydrogenatomtransfer (HAT) mechanism. Our findings shine light on enzymatic high-valent oxo-metal-halide oxidants and open new avenues for oxidative halogenation catalyst design.
Characterization and Reactivity of a Terminal Nickel(III)-Oxygen Adduct
作者:Paolo Pirovano、Erik R. Farquhar、Marcel Swart、Anthony J. Fitzpatrick、Grace G. Morgan、Aidan R. McDonald
DOI:10.1002/chem.201406485
日期:2015.2.23
nickel–oxygen adducts are scarce, meaning there is a dearth in the understanding of such oxidants. A monoanionic NiII‐bicarbonate complex has been found to react in a 1:1 ratio with the one‐electron oxidant tris(4‐bromophenyl)ammoniumyl hexachloroantimonate, yielding a thermally unstable intermediate in high yield (ca. 95 %). Electronic absorption, electronic paramagnetic resonance, and X‐ray absorption spectroscopies
Concerted proton-electron transfer oxidation of phenols and hydrocarbons by a high-valent nickel complex
作者:Katherine J. Fisher、Margalit L. Feuer、Hannah M. C. Lant、Brandon Q. Mercado、Robert H. Crabtree、Gary W. Brudvig
DOI:10.1039/c9sc05565g
日期:——
The high-valent nickel(iii) complex Ni(pyalk)2 + (2) was prepared by oxidation of a nickel(ii) complex, Ni(pyalk)2 (1) (pyalk = 2-pyridyl-2-propanoate). 2 and derivatives were fully characterized by mass spectrometry and X-ray crystallography. Electron paramagnetic resonance spectroscopy and X-ray photoelectron spectroscopy confirm that the oxidation is metal-centered. 2 was found to react with a variety
Pressure dependence of the rate constants of liquid-phase hydrogen atom radical abstraction reactions and its use for determining the steric components of the activation volume
作者:E. M. Vasil'vitskaya、B. S. �l'yanov、V. M. Zhulin
DOI:10.1007/bf00948860
日期:1984.11
Structure, Spectroscopy, and Reactivity of a Mononuclear Copper Hydroxide Complex in Three Molecular Oxidation States
作者:Tong Wu、Samantha N. MacMillan、Khashayar Rajabimoghadam、Maxime A. Siegler、Kyle M. Lancaster、Isaac Garcia-Bosch
DOI:10.1021/jacs.0c03867
日期:2020.7.15
Structural, spectroscopic, and reactivity studies are presented for an electron transfer series of copper hydroxide complexes supported by a tridentate redox-active ligand. Single crystal X-ray crystallography shows that the mononuclear [CuOH]1+ core is stabilized via intramolecular H-bonds between the H-donors of the ligand and the hydroxide anion when the ligand is in its trianionic form. This complex
介绍了由三齿氧化还原活性配体支持的氢氧化铜配合物的电子转移系列的结构、光谱和反应性研究。单晶 X 射线晶体学显示,当配体处于三阴离子形式时,单核 [CuOH]1+ 核通过配体的 H 供体和氢氧根阴离子之间的分子内 H 键稳定。该复合物经历两个可逆氧化过程,产生两种亚稳态“高价”CuOH 物质,可通过添加化学计量量的 1e-氧化剂生成。这些 CuOH 物质的特征在于一系列光谱技术,包括 UV-vis 吸收、电子顺磁共振 (EPR) 和 X 射线吸收光谱 (XAS),它们共同表明所有氧化还原对都是配体定位的。