First slide

Arenes

Question

Arrange the following compounds in increasing order of polarity(I,II,III respectively)

Moderate

A

I<II<III
B

III<II<I
C

II<I<III
D

III<I<II

Solution

Polarity of carbonyls is mainly due to following charge separation
III) forms aromatic cation on charge separation, most polar
II) forms anti-aromatic cation on charge separation, has least tendency for charge separation-least polar.

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