Question

Question: Show how a 1,2-shift forms a more stable carbocation from each intermediate.

a.

b.

c.

Short answer

Answer

a.

b.

c.

Step-by-step solution

Step-by-Step Solution Step 1: Carbocation

The positive charge on the carbon results in the formation of a carbocation. It is of four types. The order of stability of carbocation is mentioned below.

$\mathbf{3}\mathbf{°}\mathbf{>}\mathbf{2}\mathbf{°}\mathbf{>}\mathbf{1}\mathbf{°}$

Shifting of hydride or methyl

a. The shifting of hydride is shown below.

Formation of stable carbocation

b. The shifting of hydride is shown below.

Formation of stable carbocation

c. The shifting of methyl is shown below

Formation of stable carbocation