Q.

Column I Reactions Column II Mechanism

a
p Ring expansion

b
q Ring contraction

c
r Carbocation

d
s Rearrangement

t Radical anion

Column I Reactions
a	p	Ring expansion
b	q	Ring contraction
c	r	Carbocation
d	s	Rearrangement
	t	Radical anion

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Solution:

c. It is an examnle of Beckmann rearrangement reaction.
d. It is an example of bimolecular reduction (formation of pinacol) followed by acid-catalysed rearrangement reaction to form pinacolone. The formation of pinacol proceeds by the formation of a radical anion intermediate.

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Q. Column I Reactions Column II Mechanism a p Ring expansion b q Ring contraction c r Carbocation d s Rearrangement t Radical anion

c. It is an examnle of Beckmann rearrangement reaction. d. It is an example of bimolecular reduction (formation of pinacol) followed by acid-catalysed rearrangement reaction to form pinacolone. The formation of pinacol proceeds by the formation of a radical anion intermediate.