A) Cyclopentadienyl cation
B) Cyclooctatetraene
C) Cycloheptatriene
D) Cycloheptatrienylcation
Correct Answer: D
Solution :
According to Huckle, an aromatic compound must be cyclic planar having \[(4n+2)\pi \]electrons. (a)
(b) 
(c) 
(d) 
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