antiaromatic compounds

https://doi.org/10.1351/goldbook.A00382
Compounds that contain \(4\ n\) (\(n\neq 0\)) π-electrons in a cyclic planar, or nearly planar, system of alternating single and double bonds, e.g. cyclobuta-1,3-diene.
See also:
aromatic compounds
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1318 [Terms] [Paper]