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Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079

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Section
BuyFindarrow_forward

Organic And Biological Chemistry

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

Draw the structural formula of the missing compound(s) in each of the following reactions.

Chapter 4, Problem 4.103EP, Draw the structural formula of the missing compound(s) in each of the following reactions. , example  1

Chapter 4, Problem 4.103EP, Draw the structural formula of the missing compound(s) in each of the following reactions. , example  2

Chapter 4, Problem 4.103EP, Draw the structural formula of the missing compound(s) in each of the following reactions. , example  3

Chapter 4, Problem 4.103EP, Draw the structural formula of the missing compound(s) in each of the following reactions. , example  4

(a)

Interpretation Introduction

Interpretation:

The structural formula of missing compound in the given reaction has to be drawn.

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.

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

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  1

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,

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  2

Explanation

Given reaction is,

In the above reaction, the product is an acetal.  One of the reactant is hemiacetal.  Hemiacetal on reaction with an alcohol gives acetal as the product.  Acetal has methoxy group present in it.  This should have come from methanol.  Therefore, methanol is the missing compound in the given reaction...

(b)

Interpretation Introduction

Interpretation:

The structural formula of missing compound in the given reaction has to be drawn.

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.

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

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  3

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,

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  4

(c)

Interpretation Introduction

Interpretation:

The structural formula of missing compound in the given reaction has to be drawn.

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.

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

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  5

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,

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  6

(d)

Interpretation Introduction

Interpretation:

The structural formula of missing compound in the given reaction has to be drawn.

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.

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

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  7

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,

Organic And Biological Chemistry, Chapter 4, Problem 4.103EP , additional homework tip  8

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