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even when there is a possibility of conjugation why aren't bond lengths equal?

  • $\begingroup$ Could you cite where you found that the bond lengths are not equal? $\endgroup$
    – A.K.
    Mar 19, 2019 at 13:20
  • $\begingroup$ Heard of anti aromaticity it destabilizes a cyclic compound so to prevent it no conjugation $\endgroup$ Mar 19, 2019 at 13:20
  • 2
    $\begingroup$ Your title does not match your question. All double bonds are equal all right. $\endgroup$ Mar 19, 2019 at 14:09
  • $\begingroup$ Possible duplicate of Resonance structure of cyclobutadiene? $\endgroup$
    – Mithoron
    Mar 19, 2019 at 16:47

1 Answer 1


Anti-aromatic compounds have no delocalization of electrons hence no resonance. To check aromatic character we use huckel's rule of (4n+2)π e- present in a conjugated closed loop. An anti aromatic compound would have only 4nπ electrons which is the case with above mentioned compound . Hence the bond lengths are different. enter image description hereenter image description here


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