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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

When an alcohol molecule adds across the carbon-oxygen double bond of a carbonyl group in an aldehyde or ketone the

  1. a. H atom from the alcohol bonds to the carbonyl carbon atom
  2. b. OH portion from the alcohol bonds to the carbonyl oxygen atom
  3. c. OR portion from the alcohol bonds to the carbonyl carbon atom
  4. d. no correct response

Interpretation Introduction

Interpretation:

What happens when an alcohol molecules gets added to the carbonyl group in aldehyde or ketone 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.

The alkoxy group is from the alcohol and it is bonded to the carbon atom.  The hydrogen atom is bonded to the oxygen atom in the carbonyl group of aldehyde or ketone...

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