Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them. Concept introduction: Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring. Example: After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial. Stereochemistry conversions in chair conformation are shown below. Substituent position cis trans 1,2 position (a,e) or (e,a) (a,a) or (e,e) 1,3 position (a,a) or (e,e) (a,e) or (e,a) 1,4 position (a,e) or (e,a) (a,a) or (e,e) To find: chair conformer of the menthol molecule.

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Answer 1

Question

Chapter 4, Problem 53PP

Interpretation Introduction

Interpretation:

Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.

Example:

After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial.

Stereochemistry conversions in chair conformation are shown below.

Substituent position cis trans
1,2 position (a,e) or (e,a) (a,a) or (e,e)
1,3 position (a,a) or (e,e) (a,e) or (e,a)
1,4 position (a,e) or (e,a) (a,a) or (e,e)

To find: chair conformer of the menthol molecule.

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Answer 2

Question

Chapter 4, Problem 53PP

Interpretation Introduction

Interpretation:

Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.

Example:

After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial.

Stereochemistry conversions in chair conformation are shown below.

Substituent position cis trans
1,2 position (a,e) or (e,a) (a,a) or (e,e)
1,3 position (a,a) or (e,e) (a,e) or (e,a)
1,4 position (a,e) or (e,a) (a,a) or (e,e)

To find: chair conformer of the menthol molecule.

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Answer 3

Question

Chapter 4, Problem 53PP

Interpretation Introduction

Interpretation:

Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.

Example:

After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial.

Stereochemistry conversions in chair conformation are shown below.

Substituent position cis trans
1,2 position (a,e) or (e,a) (a,a) or (e,e)
1,3 position (a,a) or (e,e) (a,e) or (e,a)
1,4 position (a,e) or (e,a) (a,a) or (e,e)

To find: chair conformer of the menthol molecule.

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Answer 4

Question

Chapter 4, Problem 53PP

Interpretation Introduction

Interpretation:

Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.

Example:

After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial.

Stereochemistry conversions in chair conformation are shown below.

Substituent position cis trans
1,2 position (a,e) or (e,a) (a,a) or (e,e)
1,3 position (a,a) or (e,e) (a,e) or (e,a)
1,4 position (a,e) or (e,a) (a,a) or (e,e)

To find: chair conformer of the menthol molecule.

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Answer 5

Chapter 4, Problem 53PP

Interpretation Introduction

Interpretation:

Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.

Example:

After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial.

Stereochemistry conversions in chair conformation are shown below.

Substituent position cis trans
1,2 position (a,e) or (e,a) (a,a) or (e,e)
1,3 position (a,a) or (e,e) (a,e) or (e,a)
1,4 position (a,e) or (e,a) (a,a) or (e,e)

To find: chair conformer of the menthol molecule.

Answer 6

Chapter 4, Problem 53PP

Interpretation Introduction

Interpretation:

Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.

Example:

After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial.

Stereochemistry conversions in chair conformation are shown below.

Substituent position cis trans
1,2 position (a,e) or (e,a) (a,a) or (e,e)
1,3 position (a,a) or (e,e) (a,e) or (e,a)
1,4 position (a,e) or (e,a) (a,a) or (e,e)

To find: chair conformer of the menthol molecule.

Answer 7

Chapter 4, Problem 53PP

Interpretation Introduction

Interpretation:

Chair conformations of menthol should be drawn and least energetic conformer is needed to be predicted between them.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. in this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.

Example:

After ring flip of the conformer, axial position becomes equatorial and equatorial position becomes axial.

Stereochemistry conversions in chair conformation are shown below.

Substituent position cis trans
1,2 position (a,e) or (e,a) (a,a) or (e,e)
1,3 position (a,a) or (e,e) (a,e) or (e,a)
1,4 position (a,e) or (e,a) (a,a) or (e,e)

To find: chair conformer of the menthol molecule.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 4.2 - Prob. 1LTS Ch. 4.2 - Prob. 1PTS Ch. 4.2 - Prob. 2ATS Ch. 4.2 - Prob. 3ATS Ch. 4.2 - Prob. 4ATS Ch. 4.2 - Prob. 2LTS Ch. 4.2 - Prob. 5PTS Ch. 4.2 - Prob. 6ATS Ch. 4.2 - Prob. 3LTS Ch. 4.2 - Prob. 7PTS

Substituent position	cis	trans
1,2 position	(a,e) or (e,a)	(a,a) or (e,e)
1,3 position	(a,a) or (e,e)	(a,e) or (e,a)
1,4 position	(a,e) or (e,a)	(a,a) or (e,e)

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Chapter 4 Solutions