Higher Coordinate (Hypercarbon Containing) Carbocations and Their Role in Electrophilic Reactions of Hydrocarbons

Abstract

Experimental proof for five coordinate hypercarbon containing carbocations is reviewed and their role in hypercarbon transformations discussed. The conversion of methane and its monosubstituted derivatives into ethylene (propylene) and/or into saturated and aromatic hydrocarbons is discussed, involving both carbocationic as well as novel onium ion to ylideto olefin reactions. © IUPAC