A radical ion is both a radical and an ion. Removing one Electron from neutral benzene can produce , a radical cation; adding one can produce , a radical anion. These formulae specify net electric charge and an unpaired Electron, without claiming that both reside on one chemical atom.[ref]
Glossary of Terms Used in Physical Organic Chemistry (IUPAC Recommendations 1994): R entries by International Union of Pure and Applied Chemistry. Glossary of Terms Used in Physical Organic Chemistry, IUPAC Recommendations 1994: radical ion, benzene examples and dot/charge placement
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