Catalytic catechol oxidation by copper complexes: development of a structure–activity relationship
作者:Erica C. M. Ording-Wenker、Maxime A. Siegler、Martin Lutz、Elisabeth Bouwman
DOI:10.1039/c5dt01041a
日期:——
High activity for the catalytic oxidation of 3,5-di-tert-butylcatechol was achieved with complexes of ligands that stabilize the biomimetic CuII μ-thiolate complex, hinting at a similarity with the required Cu-oxo intermediates.
Protonation of a Biologically Relevant Cu<sup>II</sup>μ-Thiolate Complex: Ligand Dissociation or Formation of a Protonated Cu<sup>I</sup>Disulfide Species?
作者:Erica C. M. Ording-Wenker、Martijn van der Plas、Maxime A. Siegler、Célia Fonseca Guerra、Elisabeth Bouwman
DOI:10.1002/chem.201403918
日期:2014.12.15
isomerization to a CuI disulfide species that is protonated at the pyridyl moieties. Computational studies of the protonated CuII μ‐thiolate and CuI disulfide species with LSSL show that already upon addition of two equivalents of protons, liganddissociation forming [CuI(CH3CN)4]+ and protonatedligand is energetically favored over conversion to a protonated CuI disulfide complex.
一个Cu的质子诱导的电子转移反应II μ-硫醇盐配合物与Cu我含物种已经研究,实验和计算。在Cu II μ-硫醇盐配合物[铜II 2(大号我小号)2 ] 2+分离为具有新的含吡啶基配体大号我SSL我,可形成既铜II硫醇盐和Cu我二硫化物的复合物,这取决于溶剂。Cu II和Cu I配合物在添加质子时显示出反应性。多价四核络合物[Cu I 2 Cu II 2(LS)2(CH 3 CN)6 ] 4+在向含μ-硫醇盐络合物[Cu II 2(LS)2的溶液中添加两当量的强酸后结晶。] 2+,并在溶液中进一步分析。这项研究表明,将质子添加到Cu II硫醇盐化合物后,配体会从铜中心解离,这与先前报道的将氧化还原异构化为Cu I的报道相反。在吡啶基部分质子化的二硫化物。该质子化的Cu的计算研究II μ-硫醇盐和Cu我二硫化物物质与LSSL表明已经在加入两个当量的质子的,配位体离解形成的[铜我(CH 3 CN)4
Ligand Noninnocence of Thiolate/Disulfide in Dinuclear Copper Complexes: Solvent-Dependent Redox Isomerization and Proton-Coupled Electron Transfer
作者:Andrew M. Thomas、Bo-Lin Lin、Erik C. Wasinger、T. Daniel P. Stack
DOI:10.1021/ja409603m
日期:2013.12.18
isomerization and proton-coupled electron transfer mimicking these interconversions are observed in two structurally related dimeric μ,η(2):η(2)-thiolato Cu(II)Cu(II) complexes by various methods, including X-ray diffraction, XAS, NMR, and UV-vis. Spectroscopic evidence shows that a solvent-dependent equilibrium exists between the dimeric μ-thiolato Cu(II)Cu(II) state and its redox isomeric μ-disulfido