Rate of the given reactions are needed to be compared and needed to give the explanation for their rates. 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) E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

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Answer 1

Question

Chapter 8, Problem 71PP

Interpretation Introduction

Interpretation:

Rate of the given reactions are needed to be compared and needed to give the explanation for their rates.

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)

E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

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Answer 2

Question

Chapter 8, Problem 71PP

Interpretation Introduction

Interpretation:

Rate of the given reactions are needed to be compared and needed to give the explanation for their rates.

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)

E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

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Answer 3

Question

Chapter 8, Problem 71PP

Interpretation Introduction

Interpretation:

Rate of the given reactions are needed to be compared and needed to give the explanation for their rates.

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)

E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

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Answer 4

Question

Chapter 8, Problem 71PP

Interpretation Introduction

Interpretation:

Rate of the given reactions are needed to be compared and needed to give the explanation for their rates.

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)

E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

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Answer 5

Chapter 8, Problem 71PP

Interpretation Introduction

Interpretation:

Rate of the given reactions are needed to be compared and needed to give the explanation for their rates.

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)

E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

Answer 6

Chapter 8, Problem 71PP

Interpretation Introduction

Interpretation:

Rate of the given reactions are needed to be compared and needed to give the explanation for their rates.

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)

E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

Answer 7

Chapter 8, Problem 71PP

Interpretation Introduction

Interpretation:

Rate of the given reactions are needed to be compared and needed to give the explanation for their rates.

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)

E2 elimination reaction: E2 elimination occurs in a compound when the leaving group is antiperiplaner to the proton in presence of strong base.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 8.3 - Prob. 1LTS Ch. 8.3 - Prob. 1PTS Ch. 8.3 - Prob. 2ATS Ch. 8.3 - Prob. 3ATS Ch. 8.3 - Prob. 4CC Ch. 8.4 - Prob. 2LTS Ch. 8.4 - Prob. 5PTS Ch. 8.4 - Prob. 6ATS Ch. 8.5 - Prob. 3LTS Ch. 8.5 - 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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