Nickel complexes of 1,2,4-triazole derived amido-functionalized N-heterocyclic carbene ligands: Synthesis, theoretical studies and catalytic application
作者:Anuj Kumar、Linus Paulin Bheeter、Manoj Kumar Gangwar、Jean-Baptiste Sortais、Christophe Darcel、Prasenjit Ghosh
DOI:10.1016/j.jorganchem.2015.03.007
日期:2015.6
of K2CO3 as a base. The density functional theory studies performed on these complexes reveal highly polar character of the NHC–Ni σ-bonding interaction with corresponding molecular orbital having a maximum contribution (59–69%) from the NHC ligand fragments while that of a minimum contribution (4%) from the central nickel atom. The (1–3)b complexes were found to be moderately active for the catalytic
一系列镍配合物(1 - 3)b的1,2,4-三唑衍生的酰氨基官能ñ -杂环碳烯配体的合成和结构表征。特别地,[1-(R)-4 - N-(呋喃-2-基甲基)乙酰氨基-1,2,4-丁三唑-5-亚烷基] 2 Ni [R = Et(1b),i -Pr(图2b)和BN(3b中由相应的三唑鎓氯化物盐(直接反应制得)]配合物1 - 3)一个由治疗用的NiCl 2 ·6H 2 ○在K的存在2以CO 3为碱。对这些复合物进行的密度泛函理论研究表明,NHC-Niσ键与相应分子轨道的相互作用具有高极性,其中NHC配体片段的贡献最大(59-69%),而最小贡献(4%) )从中心镍原子。所述(1 - 3)b中发现的复合物为用于催化硼化溴代衍生物通过反应中等活性双(频哪醇)二硼试剂(B 2销2在Cs的存在下)2 CO 3在70℃下为基地。