Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 118 route de Narbonne, 31062, Toulouse, France.
Université de Toulouse, UPS, and CNRS, ICT FR2599, 118 route de Narbonne, 31062, Toulouse, France.
Angew Chem Int Ed Engl. 2017 Aug 21;56(35):10549-10554. doi: 10.1002/anie.201705302. Epub 2017 Jul 21.
Electropositive boron-based substituent (phosphonium bora-ylide) with an exceptionally strong π- and σ-electron donating character dramatically increases the stability of a new type of N-heterocyclic silylene 2 featuring amino- and bora-ylide-substituents. Moreover, the related silylium ion 4 and transition-metal-silylene complexes, with trigonal-planar geometries around the silicon center, are also well stabilized. Therefore, the N,B-heterocyclic silylene 2 can be used as a strongly electron-donating innocent ligand in coordination chemistry similarly to N-heterocyclic carbenes.
带正电的硼取代基（磷硼酰基）具有极强的π和σ给电子特性，极大地提高了新型 N-杂环甲硅烷基 2 的稳定性，2 具有氨基和硼酰基取代基。此外，相关的硅鎓离子 4 和过渡金属-甲硅烷基配合物，在硅中心周围具有三角平面几何形状，也得到很好的稳定。因此，N，B-杂环甲硅烷基 2 可用作配位化学中类似于 N-杂环卡宾的强给电子配体。
