question_answer 83)

  In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below: (a) If both A and R are correct and R is the correct explanation of the A. (b) If both A and R are correct but R is not the correct explanation of the A. (c) If A is correct but R is incorrect. (d) If A is incorrect but R is correct. (A) The compound cyclooctene has the following structural formula : It is cyclic and has conjugated \[8\pi \]-electron system but it is not an aromatic compound. (R)\[(4n+2)\pi \]- electrons rule does not hold good and ring is not planar.

Answer:

  (a) Cyclooctene is non-aromatic because it neither followed\[(4n+2)\pi \]- Huckel's rule nor it is planar.