Carbon-xenon bond formation

In the following section two aspects are discussed a) the syntheses of fluorinated and non-fluorinated alkynylxenonium salts, [XCsCXe][BF4], and b) the syntheses of polyfluoroalkenylxenonium salts [XCF=CFXe][BF4] and [CF2=CXXe][BF4]. These topics will provide further insight into the fundamental aspects regarding xenon-carbon bond formation. 

Xenon-carbon bond formation is now quite well exemplified, and many products contain fluorinated aryl substituents, e.g. (C6F5C02)Xe(C6F5), [(2,6-F2C5H3N)XeC6F5]+ (Figure 17.7a), [(2,6-F2C6H3)Xe][Bp4] (Figure 17.7b), [(2,6-... 

The use of a difluoroborane, RBF2, precursor has proved to be a successful strategy for alkyl, alkenyl and aUcynyl derivatives of xenon(II). Xenon-carbon(alkene) and Xe-C(alkyne) bond formation is illustrated by reactions 18.20 and 18.21. 

Xenon Bonded to Carbon. A number of stmcturally well-characterized compounds containing Xe—C bonds are known. In all cases these occur as colorless salts of xenonium cations, R—Xe" where R is a fluorophenyl or alkynyl group. The formation of the pentafluorophenylxenon(II) cation, CgFgXe+ [121850-39-3] (-30W) and CHgC N (0°C) solutions with the anions B(C3F3)3F [121850-40-6], B(CgFg) 2F- [123168-25-2], and... 

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