11.45 When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place: Give a mechanism for this reaction. (Hint : The secondary carbocation formed in step II rearranges to a more stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.

Give a mechanism for this reaction. (Hint : The secondary carbocation formed in step II rearranges to a more stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.

11.45 

The first step in the mechanism of the given reaction is protonation of the alcohol followed by loss of water to give a 2⁰ carbocation.

A

The next step is a rearrangement of the 2⁰ carbocations formed in the above step is less stable it rearranges by a 1,2-hydride shift to form more stable 3° carbocations.

The last step of the reaction is the nucleophilic attack of Br^- ion on the 3° carbocations giving the final product.

<div><div><strong>11.45&nbsp;</strong></div><div>The first step in the mechanism of the given reaction is protonation of the alcohol followed by loss of water to give a 2⁰ carbocation.</div></div><p><img src="https://images.shiksha.com/mediadata/images/articles/1687761785phpmaLV8A.jpeg" alt="" width="675" height="145">A</p><p>The next step is a rearrangement of the 2⁰ carbocations formed in the above step is less stable it rearranges by a 1,2-hydride shift to form more stable 3° carbocations.</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1687761761phpJrjX2z_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1687761761phpJrjX2z.jpeg" alt="" width="599" height="192"></picture></div></div><p>The last step of the reaction is the nucleophilic attack of Br^- ion on the 3° carbocations giving the final product.</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1687761727phpBhog17_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1687761727phpBhog17.jpeg" alt="" width="585" height="182"></picture></div></div>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment