Fusing 10-vertex closo -carborane anions with N-heterocyclic carbenes
Fusing 10-vertex closo -carborane anions with N-heterocyclic carbenes
复制标题
将 10 顶点的近碳硼烷阴离子与 N-杂环卡宾稠合
DOI：
10.1039/d2cc02596e
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发表时间：
2022
影响因子：
4.9
通讯作者：
Lavallo, Vincent
中科院分区：
文献类型：
--
作者：
Tej Raviprolu, Varun;McArthur, Sarah E.;Banda, Isaac;Gregory, Aaron;McArthur, Scott G.;Fisher, Steven P.;Lavallo, Vincent
10顶点闭碳硼烷阴离子[HCB 9 H 91 −]是克诺特在1964年发现的，是一种经典的双帽正方形反棱柱，包含一个不寻常的五配位碳中心。与其较大的二十面体表亲[HCB 11 H111 −]相比，很少有人研究其作为弱配位阴离子或配体取代基的用途。在这里，我们表明，它是可能的，以制备一个双阴离子的N-杂环卡宾（NHC）Li+加合物，以及三阴离子的C-2，C-5硫代物种具有两个10-顶点碳硼烷阴离子取代基。所有的化合物，其特征在于通过多核NMR光谱，单晶X-射线衍射，并在可能的情况下，高分辨质谱。
Discovered by Knöth in 1964, the 10-vertex closo-carborane anion [HCB9H91−] is a classical bicapped square antiprism that contains an unusual pentacoordinate carbon center. Compared to its larger icosahedral cousin [HCB11H111−], few investigations have been made into its use as a weakly coordinating anion or as a ligand substituent. Here we show that it is possible to prepare both a dianionic N-heterocyclic carbene (NHC) Li+ adduct as well as a trianionic C-2, C-5 dilithio species featuring two 10-vertex carborane anion substituents. All compounds were characterized via multinuclear NMR spectroscopy, single crystal X-ray diffraction, and HRMS when possible.