The major product R obtained in the following reaction is/are : HC ≡C-CH=CH2 (O3)/((l, H2)Z O) P

step 1 Hello everyone, let us see the following question. The major product are obtained in the followi

The major product R obtained in the following reaction...

The major product R obtained in the following reaction is/are : $$ \mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\mathrm{O}_{3}}{\underset{\left(\mathrm{l}, \mathrm{H}_{2}\right)}{\mathrm{Z}} \mathrm{O}} \mathrm{P}+\mathrm{Q} \frac{\mathrm{H}_{2} / \mathrm{Pd}}{\mathrm{B}_{2} \mathrm{SO}_{4}}{\longrightarrow} \mathrm{R} $$ (A) $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{OH}$ (B) $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}=\mathrm{O}$ (C) $\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}_{2}-\mathrm{OH}$ (D) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{OH}$

The major product R obtained in the following reaction is/are :
$$
\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\mathrm{O}_{3}}{\underset{\left(\mathrm{l}, \mathrm{H}_{2}\right)}{\mathrm{Z}} \mathrm{O}} \mathrm{P}+\mathrm{Q} \frac{\mathrm{H}_{2} / \mathrm{Pd}}{\mathrm{B}_{2} \mathrm{SO}_{4}}{\longrightarrow} \mathrm{R}
$$
(A) $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{OH}$
(B) $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}=\mathrm{O}$
(C) $\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}_{2}-\mathrm{OH}$
(D) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{OH}$

Key Concepts

Catalytic Hydrogenation under Acidic Conditions

Catalytic hydrogenation with a metal catalyst (such as palladium) in the presence of an acid can be used for selective reduction. Under carefully controlled conditions, it is possible to reduce an aldehyde group to a primary alcohol while leaving a triple bond intact, provided that the reaction conditions prevent the over?reduction of the less reactive unsaturation.

Reductive Work?up after Ozonolysis

After ozonolysis, the initially formed ozonide or intermediate fragments are usually unstable and must be converted into useful products via a reductive work?up. This step generally employs reagents such as hydrogen with a catalyst, which reduces the unstable intermediates to more benign carbonyl compounds or, under more forcing conditions, further to alcohols.

Ozonolysis of Alkenes

Ozonolysis is a reaction in which ozone cleaves carbon–carbon double bonds to yield carbonyl compounds like aldehydes and ketones. This reaction is widely used in organic synthesis to break carbon–carbon double bonds in a controlled manner, providing a pathway to fragment and functionalize unsaturated molecules.

Chemoselectivity in Ozonolysis

When a molecule contains more than one type of unsaturation (for example, an alkene and an alkyne), ozonolysis typically occurs preferentially at the alkene. This chemoselectivity arises because alkenes, being more electron?rich, are more reactive toward ozone than alkynes under standard conditions.

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