Facile Generation of a Strained Cyclic Vinyl Cation by Thermal Solvolysis of Cyclopent‐1‐enyl‐λ3‐bromanes

Last of the cyclic vinyl cations: The simple solvolysis of cyclopent-1-enyl-λ3-bromane efficiently generates the highly strained cyclopent-1-enyl cation at room temperature (see scheme). The very high nucleofugality of the aryl-λ3-bromanyl groups are responsible for this unique unimolecular dissociation. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.