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(B) The reaction of a primary aliphatic amine with nitrous acid $(HNO_2)$ produces an unstable diazonium salt,which rapidly decomposes to form a carbo

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$CH_3CH_2CH(OH)CH_3$

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(B) The reaction of a primary aliphatic amine with nitrous acid $(HNO_2)$ produces an unstable diazonium salt,which rapidly decomposes to form a carbocation.$CH_3CH_2CH_2CH_2NH_2 + HNO_2$ $\rightarrow [CH_3CH_2CH_2CH_2N_2^+]$ $\rightarrow CH_3CH_2CH_2CH_2^+ + N_2 + H_2O$This primary carbocation can undergo rearrangement (hydride shift) to form a more stable secondary carbocation.$CH_3CH_2CH_2CH_2^+ \rightarrow CH_3CH_2CH^+CH_3$The secondary carbocation then reacts with water to form the major product,butan-$2$-ol.$CH_3CH_2CH^+CH_3 + H_2O \rightarrow CH_3CH_2CH(OH)CH_3$Therefore,the major product is butan-$2$-ol.

What is the major product of the following reaction?
$CH_3CH_2CH_2CH_2NH_2 \xrightarrow{HNO_2} ?$

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What is the major product of the following reaction?$CH_3CH_2CH_2CH_2NH_2 \xrightarrow{HNO_2} ?$