When CH2=CH-COOH is reduced with LiAlH4 the compound obtained will be (a) CH3-CH2-COOH (b) CH2=C

step 1 As we know that when CS -3 -1 -CH -C -O -O -H is reduced with LIALH -A -L -H -4, the compound, t

When CH2=CH-COOH is reduced with LiAlH4 the compound...

When $\mathrm{CH}_2=\mathrm{CH}-\mathrm{COOH}$ is reduced with $\mathrm{LiAlH}_4$ the compound obtained will be (a) $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{COOH}$ (b) $\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2 \mathrm{OH}$ (c) $\mathrm{CH}_3^2-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{OH}$ (d) $\mathrm{CH}_3-\mathrm{CH}_2^2-\mathrm{CHO}$

When $\mathrm{CH}_2=\mathrm{CH}-\mathrm{COOH}$ is reduced with $\mathrm{LiAlH}_4$ the compound obtained will be
(a) $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{COOH}$
(b) $\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2 \mathrm{OH}$
(c) $\mathrm{CH}_3^2-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{OH}$
(d) $\mathrm{CH}_3-\mathrm{CH}_2^2-\mathrm{CHO}$

Key Concepts

LiAlH4 as a Reducing Agent

Lithium aluminum hydride (LiAlH4) is a powerful reducing agent used in organic synthesis to convert functional groups to their corresponding reduced forms. It is known for its ability to reduce carboxylic acids, esters, and amides into alcohols, as well as reducing other polar bonds. Its strong nucleophilic hydride ion is responsible for attacking electrophilic carbon atoms, leading to the formation of new C-H bonds in products.

Reduction of Carboxylic Acids

Carboxylic acids are typically reduced by LiAlH4 to yield primary alcohols. The reaction generally proceeds through the formation of an intermediate aldehyde, which does not accumulate under the reaction conditions. This method is widely used because of the efficiency and selectivity of LiAlH4 in handling carboxylic acid functionalities without additional reagents.

Chemoselectivity in Reduction Reactions

Chemoselectivity refers to the preference of a chemical reagent to react with one functional group in the presence of other potentially reactive groups. In the context of LiAlH4 reduction of unsaturated carboxylic acids, the reagent selectively reduces the carboxylic acid group while typically leaving the carbon-carbon double bond intact, thereby forming an allylic alcohol. This reactivity profile is important for synthetic strategies that aim to preserve certain functional groups while transforming others.

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