(
)
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