Abstract: Cyclopropylallyl cations rearrange at measurable rates to give a variety of cyclohexenyl and cyclopentenyl cations. The reaction was studied in three different acid solvents, HfS04, FS03H, and FS03H-SbF5, the “acidity” increasing greatly in the order given. The exact products are quite different in each solvent and a mech-anism is proposed to account for the product cations actually observed. he 3-cyclopropylallyl cations (Ia-c) can ...
