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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

To produce an acetal from a ketone, the ketone must react with which of the following?

  1. a. two identical alcohol molecules
  2. b. two different alcohol molecules
  3. c. two alcohol molecules, which may or may not be identical
  4. d. no correct response

Interpretation Introduction

Interpretation:

For an acetal to be formed from ketone, the ketone has to react with what has to be chosen from the given options.

Concept Introduction:

Aldehydes contain a carbonyl group that is bonded to a hydrogen atom and a carbon atom.  Ketones are compounds that contain a carbonyl group bonded to two carbon atoms.  Aldehydes and ketones undergo addition reaction across the carbonyl group.

Aldehydes and ketones react with alcohol to form hemiacetal as the product.  This reacts with further molecule of aldehyde or ketone to form acetal.

Explanation

Reason for correct option:

Hemiacetal is a addition product that is obtained by reaction between aldehyde or ketone with alcohol.  The general reaction of hemiacetal formation can be given as,

From the above general structure of hemiacetal it is found that it is an organic compound that contains a carbon atom that is bonded to an alkoxy group and a hydroxyl group.

Acetal is formed when the formed hemiacetal reacts with further alcohol molecule so that the hydroxyl group in the hemiacetal is converted into alkoxy group.  This can be shown as given below,

The alcohol that is reacting with the hemiacetal can be from the same alcohol which involved in formation of hemiacetal or a different alcohol molecule...

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