ChemInform Abstract: The First Persistent β‐Silyl‐Substituted Vinyl Cation.

Abstract

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Isomeric C5H11Si+ ions from the trimethylsilylation of acetylene: An experimental and theoretical study

“…␤-silyl hyperconjugative stabilization of vinly cations is well documented. In solution ␤-silyl-substituted vinyl cation can be generated by protonation of silyl substituted allenes [42] and silyl substituted alkynes [43][44][45][46] under carefully controlled experimental conditions in non-nucleophilic solvents and by addition of inicipient silylium ions to alkynes in the presence of inert counterions [47][48][49]. The determination of the X-ray structure of a vinyl cation stabilized by two ␤-silyl substituents has also been achieved [50].…”