Abstract
AbstractGas‐phase ion–molecule reactions of a variety of fluorosilyl carbanions with compounds containing double bonds to oxygen, XO, have been examined using pulsed ion cyclotron resonance spectroscopy. The predominant reaction channel observed for species not containing acidic hydrogens is a Wittig‐like process involving SiO bond formation and elimination of XCH2 species. The gas‐phase acidity of F3Si(CH3) has been determined and those of F2Si(CH3)2 and FSi(CH3)3 have been estimated. From the fluoride transfer reactions of F3SiCH2− the fluoride affinity of F2SiCH2 has been estimated and limits on the π bond strength in this silaethene obtained. Potential analytical applications of the Wittig reactivity have been discussed.
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