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Question

Number of anti-aromatic compound in the following compound is _____.

 

Moderate
Solution

The molecules, which have 4nπ electrons are anti-aromatic compounds

a) has 4π-electrons

(b) has 6 + 2 (from oxygen atom) - 8π electrons

(c) has 6π-electrons and one C-atom is sp3 hybridised hence it is non - aromatic

(d) is aromatic

(e) has 4π-electrons as available lone pair with N - atom will not be delocalized in this conjugated system.

(f) has 12π-electrons. 

Hence, (a), (b), (e) and (f) are anti-aromatic. 


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