Question

Order of rate of reaction of following compounds with $AgN{O}_3$ (following $S_{N}1$ mechanism).

• A. II > III > I
• B. III > II > I
• C. I > II > III
• D. III > I > II

Answer 1

Answer: (C)

Here the reactivity order is



(I) becomes aromatic after removal of $B{r}^{-}$

(II) becomes non aromatic after removal of $B{r}^{-}$

(III) becomes anti aromatic after removal of $B{r}^{-}$