This paper responds to the preceeding article by Professor T. Tidwell in which he provides arguments for vinyl cations being an intermediate in most electrophilic additions to alkynes. This paper underlines the different experimental results obtained from alkenes and alkynes and points out that most, if not all, well-established vinyl cation have been found to rearrange although such rearrangement is rare in electrophilic additions to alkynes.
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