User:Graeme Bartlett/Enium ion

An enium ion is a carbocation with one positive charge and a double bond. It can be considered as an alkane that has lost a hydride ion. Alternatively it can be considered as an alkene, with a proton added to the double bond, as a three-center two-electron bond.

List of enium ions

 * Methenium C$+ 3$ aka methyl cation
 * Ethenium C2H5+
 * 1-Propenium CH3CH2CH2+
 * 2-Propenium CH3CH+CH3
 * 1-Butenium CH3CH2CH2CH2+
 * 2-Butenium CH3CH2CH+CH3
 * 2-Methyl-1-Propenium (CH3)2CHCH2+
 * 2-Methyl-2-Propenium (CH3)3C+
 * Cyclopropenium
 * Cyclobutenium
 * Cyclopentenium
 * Benzenium
 * 1-Naphthalenium
 * 2-Naphthalenium
 * 1,3-dichloro-1,3-bis(dimethylamino)propenium chloride
 * Tropylium cation