Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : [6] Annulene. [8] Annulene and cis –[10] Annulene, are respectively aromatic, not-aromatic and aromatic.

 

                                           [10] - Annulene

 

 

Reason R : Planarity is one of the requirements of aromatic systems.

In the light of the above statements, choose the most appropriate answer from the options given below.

[6] – annulene

[8] – annulene

[10] – annulene

If this annulene with five cis double bonds were planar, each internal angle would be 144°. Since a normal double bond has bond angle of 120°, this would be from ideal. This compound can be made but it does not adopt a planar conformation and therefore is not aromatic even though it has ten $\mathrm{\pi }$ electrons.

NOTE : Since it is a pyp paper , we are not changing the question( as it is instructed to us).Many books, mentioned it is non aromatic, due to loss in planarity, so this question will be ambiguous, but should be noted that it is given in 27 july paper 2022,  in forenoon session