A generic name for carbocations, real or hypothetical, that have at least one important contributing structure containing a tervalent carbon atom with a vacant p-orbital. (The name implies a protonated carbene or a substitution derivative thereof.) years. For example, the term 'ethylcarbonium ion' has at times been used to refer either to CH3CH2+ (ethyl cation) or (correctly) to CH3CH2CH2+ (propyl cation)., üldnimetus karbokatioonidele, mis sisaldavad vähemalt ühte neljavalentset, vakantse p-orbitaaliga süsinikuaatomit