A) Cyclopentadienyl anion
B) Cycloheptatrienyl cation
C) Cyclooctatetraene
D) Thiophene
Correct Answer: C
Solution :
Cyclooctatetraene is not aromatic in nature. In cyclooctatetraene, delocalisation of\[\pi -\]\[\pi -\]electrons takes place but Huckels rule is not followed. According to Huckels rule, it should contains\[10\pi (4n+2)\] electrons but it contains only\[8\pi \]electrons. \[\pi -\]electron\[(8)\ne (4n+2)=10\](i.e., Huckel rule is not followed), hence it is not aromatic.You need to login to perform this action.
You will be redirected in
3 sec