Aromatic ion

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DRAFT DEFINITION
Aromatic ion

A planar cyclic ion that obeys the the Huckel (4n + 2) rule where n is a positive integer representing the number of conjugated π electrons. Charge delocalization leads to greater stability compared to a hypothetical localized structure.

Considered between 2004 and 2006 but not included in the 2006 PAC submission
This is an unofficial draft definition presented for information and comment.

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