Dehalogenation intermediate alkyne

In some cases, especially when alkynes are prepared by dehalogenations of haloalkenes, the intermediate organometallic compounds, depending on the nature of the metal, are sufficiently stable to be identified or even isolated at ambient temperatures. This property can be exploited in transmetalation reactions with suitable organometallic compounds, and thus new polylluorinated organometallic species may be prepared. 

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