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Cation containing an even number of electrons with the excess positive charge formally located on a carbon atom. This is a general term embracing carbenium ions, carbonium ions, and cations derived from corresponding carbon-centred free radicals by removal of the unpaired electron.

Note: Such carbocations may be named by adding the word cation to the name of the corresponding radical, but such names do not imply structure (e.g., whether three- or five- coordinated carbon atoms are present).
Related Term(s):

IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979. Compiled by J. Inczédy, T. Lengyel, A. M. Ure. Blackwell Scientific Publications, Oxford (1997). On-line corrected version: /publications/analytical compendium (2000).

IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins.

From Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.

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