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JIPMER 2014

Exam: JIPMER
Year: 2014
Subject: Chemistry
Chapter: Aldehydes and Ketones

JIPMER 2014 · Chemistry · Aldehydes and Ketones

Clemmensen reduction of a ketone is carried out in the presence of...

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

Options

A $\mathrm{Zn}-\mathrm{Hg}$ with HCl
B $\mathrm{LiAlH}_4$
C $\mathrm{H}_2$ and Pt as catalyst
DGlycol with KOH

Correct answer

A. $\mathrm{Zn}-\mathrm{Hg}$ with HCl

Step-by-step solution

The reducing agent used in Clemmensen reduction is

\mathrm{Zn}-\mathrm{Hg}

and HCl . It converts

\gt\mathrm{C}=\mathrm{O}

group into

-\mathrm{CH}_2

group.

\gt

\mathrm{C}=\mathrm{O}

\xrightarrow{\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}}\gt\mathrm{CH}_2

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