Keywords: Pentamethylcyclopentenyl-cation-2D-skeletal-A.png Skeletal formula of the pentamethylcyclopentenyl cation CMe <sub>3</sub> CHMe <sub>2</sub><sup>+</sup> Structure drawn in http //www cambridgesoft com/software/ChemBioDraw/ ChemBioDraw Ultra 12 0 Own 2010-06-04 Ben Mills Benjah-bmm27 Images by Ben Mills Cyclopentadienyl cations |