To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure. Concept Introduction : Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

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Answer 1

Question

Chapter 4, Problem 56P

(a)

Interpretation Introduction

Interpretation:

To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure.

Concept Introduction:

Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

(b)

Interpretation Introduction

Interpretation:

To make model for compound B and consider the transannular and gauche interactions of its chair conformations and to elaborate the problems of conformation when compared to that of compound A.

Concept Introduction:

When a molecule tends to rotate about its single or double bonds, the molecule attains a specific shape based on its stability such that it has less strained position. This is said to be conformation.

When there is interaction between two non-bonding molecular groups in a large ring which are not adjacent, it is said to be trans annular. When the ring substitutes of the adjacent groups has a non- bonded interaction, it is said to be gauche interaction.

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Consider pentane, C5H12. Looking through the internal C3-C4single bond, draw thesix Newman projections (where the angle between two bonds as you look through the C3and C4bond is either 0°or 60°of the different conformations. Label the conformers/rotamers using I, II, etc. a.Which conformer is the most stable? the least stable? b.Which rotamer is the anticonformer? the gaucheconformer? c.Draw the anticonformer in saw horse projection.

2. H3CO H3CO HO 1. Consider the molecule shown below. [1] Draw the two chair conformations for the compound. [2] Identify which of the two chair conformations is more stable and explain why. H3CO Jonoto NH₂ How are the following molecules related? (exactly the same, completely different, constitutional isomers, enantiomers, or diastereomers). OH OH OCH3 HO“ OH H3CO H3CO is content is protected and may not be shared, uploaded of ributed OCH3 HO,,, OH O... "OCH3

4. Draw the most and least stable conformations of the following substituted cyclohexanes in the chair format (excluding transient conformations like half chair, twist boat and boat). Br BL Br Br

Answer 2

Question

Chapter 4, Problem 56P

(a)

Interpretation Introduction

Interpretation:

To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure.

Concept Introduction:

Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

(b)

Interpretation Introduction

Interpretation:

To make model for compound B and consider the transannular and gauche interactions of its chair conformations and to elaborate the problems of conformation when compared to that of compound A.

Concept Introduction:

When a molecule tends to rotate about its single or double bonds, the molecule attains a specific shape based on its stability such that it has less strained position. This is said to be conformation.

When there is interaction between two non-bonding molecular groups in a large ring which are not adjacent, it is said to be trans annular. When the ring substitutes of the adjacent groups has a non- bonded interaction, it is said to be gauche interaction.

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Answer 3

Question

Chapter 4, Problem 56P

(a)

Interpretation Introduction

Interpretation:

To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure.

Concept Introduction:

Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

(b)

Interpretation Introduction

Interpretation:

To make model for compound B and consider the transannular and gauche interactions of its chair conformations and to elaborate the problems of conformation when compared to that of compound A.

Concept Introduction:

When a molecule tends to rotate about its single or double bonds, the molecule attains a specific shape based on its stability such that it has less strained position. This is said to be conformation.

When there is interaction between two non-bonding molecular groups in a large ring which are not adjacent, it is said to be trans annular. When the ring substitutes of the adjacent groups has a non- bonded interaction, it is said to be gauche interaction.

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Answer 4

Question

Chapter 4, Problem 56P

(a)

Interpretation Introduction

Interpretation:

To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure.

Concept Introduction:

Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

(b)

Interpretation Introduction

Interpretation:

To make model for compound B and consider the transannular and gauche interactions of its chair conformations and to elaborate the problems of conformation when compared to that of compound A.

Concept Introduction:

When a molecule tends to rotate about its single or double bonds, the molecule attains a specific shape based on its stability such that it has less strained position. This is said to be conformation.

When there is interaction between two non-bonding molecular groups in a large ring which are not adjacent, it is said to be trans annular. When the ring substitutes of the adjacent groups has a non- bonded interaction, it is said to be gauche interaction.

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Answer 5

Chapter 4, Problem 56P

(a)

Interpretation Introduction

Interpretation:

To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure.

Concept Introduction:

Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

(b)

Interpretation Introduction

Interpretation:

To make model for compound B and consider the transannular and gauche interactions of its chair conformations and to elaborate the problems of conformation when compared to that of compound A.

Concept Introduction:

When a molecule tends to rotate about its single or double bonds, the molecule attains a specific shape based on its stability such that it has less strained position. This is said to be conformation.

When there is interaction between two non-bonding molecular groups in a large ring which are not adjacent, it is said to be trans annular. When the ring substitutes of the adjacent groups has a non- bonded interaction, it is said to be gauche interaction.

Answer 6

Chapter 4, Problem 56P

(a)

Interpretation Introduction

Interpretation:

To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure.

Concept Introduction:

Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

Answer 7

Chapter 4, Problem 56P

(a)

Interpretation Introduction

Interpretation:

To make model for compound A and draw the chair conformation, label as equatorial or axial and circle the most stable structure.

Concept Introduction:

Conformation is considered as the shape of molecule which it adopts when it rotates about its single or double bonds. When the molecule tries to take up the less strained position, it is the most stable form.

Answer 8

(b)

Interpretation Introduction

Interpretation:

To make model for compound B and consider the transannular and gauche interactions of its chair conformations and to elaborate the problems of conformation when compared to that of compound A.

Concept Introduction:

When a molecule tends to rotate about its single or double bonds, the molecule attains a specific shape based on its stability such that it has less strained position. This is said to be conformation.

When there is interaction between two non-bonding molecular groups in a large ring which are not adjacent, it is said to be trans annular. When the ring substitutes of the adjacent groups has a non- bonded interaction, it is said to be gauche interaction.

Answer 9

(b)

Interpretation Introduction

Interpretation:

To make model for compound B and consider the transannular and gauche interactions of its chair conformations and to elaborate the problems of conformation when compared to that of compound A.

Concept Introduction:

When a molecule tends to rotate about its single or double bonds, the molecule attains a specific shape based on its stability such that it has less strained position. This is said to be conformation.

When there is interaction between two non-bonding molecular groups in a large ring which are not adjacent, it is said to be trans annular. When the ring substitutes of the adjacent groups has a non- bonded interaction, it is said to be gauche interaction.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 4.1 - Prob. 4.1E Ch. 4.1 - Prob. 4.3TIY Ch. 4.2 - Prob. 4.4E Ch. 4.2 - Prob. 4.6TIY Ch. 4.3 - Prob. 4.7E Ch. 4.4 - Prob. 4.8E Ch. 4.4 - Prob. 4.10TIY Ch. 4.4 - Prob. 4.11E Ch. 4.4 - Prob. 4.12E Ch. 4.4 - Prob. 4.14TIY

Solution Summary: The author explains that conformation is the shape of a molecule when it rotates about its single or double bonds.

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