Question

Why this is not AEROMATIC

Answer 1

According to Huckle's rule a compound is aromatic if

1) there is conjugation in whole ring

2) it is a flat cyclic system (or sp2 hybridised carbon)

3) (4n+2) pi electrons should take part in resonance

and

According to him the compound is Anti Aromatic if

1) same as above
2) same as above
3) 4n electrons should take part in resonance

now in this question, first 2 conditions are met but third condition is not met as it has total 16 pi electrons i.e. 4n and not 4n+2 electrons

Hence it is Anti aromatic and not aromatic

Hope it helps!!!!