even when there is a possibility of conjugation why aren't bond lengths equal?
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$\begingroup$ Could you cite where you found that the bond lengths are not equal? $\endgroup$– A.K.Mar 19, 2019 at 13:20
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$\begingroup$ Heard of anti aromaticity it destabilizes a cyclic compound so to prevent it no conjugation $\endgroup$– Aditya GargMar 19, 2019 at 13:20
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2$\begingroup$ Your title does not match your question. All double bonds are equal all right. $\endgroup$– Ivan NeretinMar 19, 2019 at 14:09
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$\begingroup$ Possible duplicate of Resonance structure of cyclobutadiene? $\endgroup$– MithoronMar 19, 2019 at 16:47
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1 Answer
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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.
