
Vinyl Cation
Vinyl, Reactive Intermediate, Alkyne
Herausgegeben: Krastyo Morpheus, Isidoros
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A vinyl cation is a positively charged molecule (a cation) that also contains a vinyl group ( CH=CH2). Generally the charge is on one of the double-bonded carbons. There is debate on whether a vinyl cation intermediate forms with the addition of a halide (H-X) compound onto a terminal alkyne for halogenation reactions. Alternatively, some believe that the addition of H and Br in this case is actually concerted.