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。