reduced α-diimine chelate. Addition of CO2 to the nickel vinyl complex resulted in insertion into the nickel–carbon bond to yield the corresponding nickel acrylate (iPrDI)Ni(κ2-O2CCH═CH2). EPR spectroscopy coupled with DFT calculations established that the S = 1/2 product maintains the nickel(II) oxidation state with an α-diimine-centered radical. Addition of acrylic acid to (iPrDI)Ni(CH═CH2) induced rapid
的芳基取代的α二
亚胺(DI)
镍乙烯基配合物(的iPr DI)的Ni(CH = CH 2)(的iPr DI = [2,6-(我PR)2 C ^ 6 ħ 3 N = C(CH 3)] 2)被合成并在结构上表征。该络合物在固态是二聚体,并且在
镍处具有扭曲的正方形平面几何形状。X射线单晶衍射,EPR,磁化率和NMR分析的结合被用来阐明化合物的电子结构,最好将其描述为α单独还原的低自旋Ni(II)衍
生物-二
亚胺螯合物。添加CO 2到
镍乙烯基复杂导致插入
镍-碳键,得到相应的
镍丙烯酸酯(的iPr DI)的Ni(κ 2 -O 2 CCH═CH 2)。EPR光谱与DFT计算相结合,确定S = 1/2乘积以α-二
亚胺为中心的自由基保持了
镍(II)的氧化态。
丙烯酸的除(的iPr DI)的Ni(CH = CH 2)诱导快速,净双
金属还原消除,以释放
丁二烯和产生的亚稳烯烃结合的
丙烯酸复合物(的iPr DI)的Ni(η