Boranes were getting borin': Owing to the Lewis acidic character of the central carbon atom, a bisfluorenyl‐substituted allene 1 could be used instead of B(C6F5)3 for the generation of frustratedLewispairs. Mixtures of the allene and the bulky N‐heterocyclic carbene shown in red (Dipp=diisopropylphenyl) caused heterolyticcleavage of the SSbond in disulfides.
硼烷变得越来越稀疏:由于中心碳原子的路易斯酸性特征,可以使用双芴基取代的亚丙基1代替B(C 6 F 5)3来生成沮丧的路易斯对。在红色(迪普=二异丙基苯基)所示的丙二烯和笨重的N-杂环卡宾的混合物引起了S的异裂在二硫化物S键。