Carbocation
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A carbocation is a species containing a carbon atom that lacks an octet of valence electrons and bears a formal charge of +1.
eg:
Some carbocations are resonance stabilized, in which case some or all resonance forms of the species fit the above definition.
eg:
see also alkyl carbocation, allylic carbocation, benzylic carbocation, acylium ion, alkenyl carbocation, aryl carbocation