Publicados in Henry Rzepa's Blog

It is not only the non-classical norbornyl cation that has proved controversial in the past. A colleague mentioned at lunch (thanks Paul!) that tri-coordinate group 14 cations such as R 3 Si + have also had an interesting history.[cite]10.1021/ja990389u[/cite] Here I take a brief look at some of these systems. Their initial characterisations, as with the carbon analogues, was by 29 Si NMR.

References

General ChemistryCatalysisOrganic Chemistry
Inglês

Reactions of Diaryldibromodisilenes with N‐Heterocyclic Carbenes: Formation of Formal Bis‐NHC Adducts of Silyliumylidene Cations

Publicados in Chemistry – A European Journal
Autores Tomohiro Agou, Naoki Hayakawa, Takahiro Sasamori, Tsukasa Matsuo, Daisuke Hashizume, Norihiro Tokitoh

AbstractReactions of stable 1,2‐dibromodisilenes ((E)‐Ar(Br)SiSi(Br)Ar) with N‐heterocyclic carbenes (NHC) afforded NHC–arylbromosilylene adducts or bromide salts of the corresponding bis‐NHC adducts of the formal arylsilyliumylidene cations ([ArSi:]+). In some cases, an NHC was able to replace a bromide anion in the coordination sphere of the arylbromosilylene–NHC adduct.