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(C) The reaction of $n$-butyl alcohol $(CH_3CH_2CH_2CH_2OH)$ with $HBr$ involves the formation of a primary carbocation, which undergoes a $1,2$-hydri

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(C) The reaction of $n$-butyl alcohol $(CH_3CH_2CH_2CH_2OH)$ with $HBr$ involves the formation of a primary carbocation, which undergoes a $1,2$-hydride shift to form a more stable secondary carbocation, leading to a rearranged product ($2$-bromobutane).
In the reaction with conc. $H_2SO_4$ at $413 \ K$, the primary carbocation intermediate can undergo rearrangement before elimination to form the alkene.
In the reaction with $PCl_5$ or $SOCl_2$ (in the presence of pyridine), the reaction proceeds via an $S_N2$ mechanism. In an $S_N2$ mechanism, the nucleophile attacks the carbon atom from the backside, and the leaving group departs simultaneously. Since there is no carbocation intermediate formed in an $S_N2$ reaction, no rearrangement can occur.
Therefore, the reaction of $n$-butyl alcohol with $PCl_5$ or $SOCl_2$ (in the presence of pyridine) does not involve a rearrangement reaction.

List-$I$	List-$II$
$A. \ C_6H_5NHNH_2$	$I. \ \text{Schiff base}$
$B. \ NH_2OH$	$II. \ \text{Hydrazone}$
$C. \ C_6H_5NH_2$	$III. \ \text{Oxime}$
	$IV. \ \text{Phenyl hydrazone}$

The major product of which of the following reactions is not obtained by a rearrangement reaction?

Similar Questions

Match the following reagents with the products obtained when they react with a ketone.
List-$I$ List-$II$
$A. \ C_6H_5NHNH_2$ $I. \ \text{Schiff base}$
$B. \ NH_2OH$ $II. \ \text{Hydrazone}$
$C. \ C_6H_5NH_2$ $III. \ \text{Oxime}$
$IV. \ \text{Phenyl hydrazone}$

Correct answer is:

Compounds containing two $-OH$ groups on the same carbon atom are generally unstable,but which of the following is stable?

Write about the Wolff-Kishner reduction reaction. Or,write the reduction reaction of aldehydes and ketones by the Wolff-Kishner reduction reaction.

Identify the correct reagents for the given reaction sequence:

Haloform reaction is characteristic of

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