From Mass Spectrometry Terms
A planar cyclic ion with 4n π electrons and is therefore not aromatic.
See aromatic ion
|Considered between 2004 and 2006 but not included in the 2006 PAC submission|
|This is an unofficial draft definition presented for information and comment. For current IUPAC recommended mass spectrometry terms, see the Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.|