SEARCH Articles Figures Tables Carbocation Generation The Role of Protonation Carbocation Stability and the Occurrence of Molecular Rearrangements Criteria for the Formation of Nonclassical Carbocations Evidence for the Mechanism of Electrophilic Additions Carbocation Rearrangements Resonance and the Stability of Carbocations Secondary a-deuterium kinetic isotope effect and the structure of ferrocenylmethyl carbocation type transition state Stabilities of carbocations in the gas phase The Development of Carbocation Theory The Interplay between experiment and theory computational NMR spectroscopy of carbocations The Norbornyl Cation and Other Nonclassical Carbocations Topic 4.1. The Role Carbocations and Carbonium Ions in Petroleum Processing