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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis, electronic properties of a pentafluoroethyl-derivatized nickel pincer complex
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Synthesis, electronic properties of a pentafluoroethyl-derivatized nickel pincer complex

机译:五氟乙基衍生的镍钳配合物的合成,电子性质

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The synthesis of a bis(amino)amide nickel pincer complex bearing a perfluoroethyl ligand was effected by reaction of the corresponding nickel chloride complex with cesium fluoride and trimethyl(pentafluoroethyl)silane. Electrochemical experiments revealed that the oxidation of the LNi-C _2F _5 complex occurs at the same potential as the LNi-Cl derivative, but reduction of the LNi-C _2F _5 complex occurs at slightly more positive potentials. The similarity of the electrochemical data was corroborated by density functional theory (DFT), which predicts that the energies of the HOMOs (HOMO = highest occupied molecular orbital) and LUMOs (LUMO = lowest unoccupied molecular orbital) of the LNi-C _2F _5 and LNi-Cl complexes are equal in magnitude. DFT also revealed that the HOMOs of the bis(amino)amide nickel pincer complexes are primarily ligand in character, while the LUMOs are predominantly metal in character, supporting redox-activity with this ligand.
机译:通过使相应的氯化镍配合物与氟化铯和三甲基(五氟乙基)硅烷反应来实现带有全氟乙基配体的双(氨基)酰胺镍钳夹配合物的合成。电化学实验表明,LNi-C _2F _5络合物的氧化与LNi-Cl衍生物的电势相同,但LNi-C _2F _5络合物的还原在正电势稍高的情况下发生。电化学数据的相似性得到密度泛函理论(DFT)的证实,密度泛函理论(DFT)预测LNi-C _2F _5的HOMO(HOMO =最高占据分子轨道)和LUMO(LUMO =最低未占据分子轨道)的能量和LNi-Cl络合物的大小相等。 DFT还显示,双(氨基)酰胺镍钳形配合物的HOMOs主要是配体,而LUMOs主要是金属,支持与该配体的氧化还原活性。

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