Electronic Structures and Reactivity Profiles of Aryl Nitrenoid-Bridged Dicopper Complexes
作者:Kurtis M. Carsch、James T. Lukens、Ida M. DiMucci、Diana A. Iovan、Shao-Liang Zheng、Kyle M. Lancaster、Theodore A. Betley
DOI:10.1021/jacs.9b09616
日期:2020.2.5
indicate that the formally Class IIIA mixed valence complexes of the type [(Rdmx)Cu2(µ2-NAr)]-, featuring significant NAr-localized spin following reduction from electronic population of the [Cu2(µ2-NAr)] π* manifold and contrasting previ-ous methods for engendering iminyl character through chemical oxidation. The reactivity of the isolable imido and iminyl complexes are examined for prototypical radical-promoted
以双核 pacman 二吡啉配体支架(Mesdmx、tBudmx:二甲基黄嘌呤桥接、共面双二吡啶)为模板的二铜配合物是通过用均三甲苯(CuMes;Mes:均三甲苯)去质子化/金属化或通过用来自相应去质子化配体的亚铜前体进行金属转移来合成的。通过用芳基叠氮化物处理相应的二铜配合物合成中性酰亚胺配合物(Rdmx)Cu2(μ2-NAr)(R: Mes, tBu; Ar: 4-MeOC6H4, 3,5-(F3C)2C6H3)。虽然 (Mesdmx)Cu2(μ2-N(C6H4OMe)) 用钾石墨进行单电子还原会在室温下引发分子内苄基 CH 胺化,但 (tBudmx)Cu2(μ2-NAr) 的化学还原会导致可分离的 [ (tBudmx)Cu2(μ2-NAr)]-产物盐。通过变温电子顺磁共振光谱、X射线吸收光谱(Cu L2,3/K-edge、N K -edge)、光谱学和 DFT/CASSCF 计算。这