aligned CH_2=CH-CHO ? CH_2= & CH & -CH_2-OH aligned Suitable reagent for conversion of following reaction?

Correct answer: A. NaBH_4 The suitable reagent for the conversion CH_2=CH-CHO ? CH_2=CH-CH_2-OH is NaBH_4 . It is a selective reagent and does not reduce carbon-carbon double bond. Thus, unsaturated alcohols can be prepared.

JIPMER 2019

Exam: JIPMER
Year: 2019
Subject: Chemistry
Chapter: Aldehydes and Ketones

JIPMER 2019 · Chemistry · Aldehydes and Ketones

aligned CH_2=CH-CHO ? CH_2= & CH & -CH_2-OH aligned Suitable...

\begin{aligned} \mathrm{CH}_2=\mathrm{CH}-\mathrm{CHO} \xrightarrow{?} \mathrm{CH}_2= & \mathrm{CH} \\ & -\mathrm{CH}_2-\mathrm{OH}\end{aligned}

Suitable reagent for conversion of following reaction?

Options

A $\mathrm{NaBH}_4$
B $\mathrm{Ni} / \mathrm{H}_2$
C $\mathrm{Zn} / \mathrm{Hg} / \mathrm{HCl}$
DRed $\mathrm{P}+\mathrm{Hi}$

Correct answer

A. $\mathrm{NaBH}_4$

Step-by-step solution

The suitable reagent for the conversion

\mathrm{CH}_2=\mathrm{CH}-\mathrm{CHO} \xrightarrow{?} \mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH}

\mathrm{NaBH}_4

. It is a selective reagent and does not reduce carbon-carbon double bond. Thus, unsaturated alcohols can be prepared.

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