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Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079

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Chapter
Section
BuyFindarrow_forward

Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079
Textbook Problem

Which of the following oxidizing or reducing agents would convert a ketone to an alcohol?

  1. a. H2, Ni catalyst
  2. b. Tollens’ solution
  3. c. Benedict’s solution
  4. d. no correct response

Interpretation Introduction

Interpretation:

In order to convert a ketone into alcohol, the correct option has to be chosen from the given oxidizing and reducing agents.

Concept Introduction:

In organic chemistry, oxidation reaction is referred to the number CO bonds increase and/or number of CH bonds decrease.

In organic chemistry, reduction reaction is referred to the number CO bonds decrease and/or number of CH bonds increase.

Alcohols undergo oxidation reaction and reduction reaction.  This depends upon the number of hydrogen atoms that is bonded to the alpha carbon atom.  Primary and secondary alcohol undergoes oxidation reaction while tertiary alcohol does not undergo oxidation reaction.  Primary alcohols undergo oxidation to give aldehyde and carboxylic acid as product.  Secondary alcohol undergoes oxidation to give ketone as the product.

Aldehyde undergoes oxidation to give carboxylic acid as the product while ketone does not undergo oxidation reaction.

The reverse of oxidation reaction is reduction reaction.  Reduction of aldehyde gives primary alcohol as the product and reduction of ketone gives secondary alcohol as the product.  Reduction can be accomplished using hydrogen gas and a metal catalyst namely nickel.

Explanation

Reason for correct option:

Ketones is converted into alcohol by reduction reaction.  The alcohol formed from ketone on reduction is secondary alcohol.  The general reaction can be given as,

Reduction of ketones can be done by using hydrogen gas with nickel catalyst.

Hence, the correct option is option (a).

Reason for incorrect option:

Option (b) tells that the ketone is converted into alcohol by using Tollen’s solution...

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