A molecule of ethane ( H 3 C-CH 3 ) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained. Concept introduction: In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

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Answer 1

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Chapter 4, Problem 4.5YT

Interpretation Introduction

Interpretation:

A molecule of ethane (H3C-CH3) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained.

Concept introduction:

In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

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Answer 2

Question

Chapter 4, Problem 4.5YT

Interpretation Introduction

Interpretation:

A molecule of ethane (H3C-CH3) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained.

Concept introduction:

In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

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Answer 3

Question

Chapter 4, Problem 4.5YT

Interpretation Introduction

Interpretation:

A molecule of ethane (H3C-CH3) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained.

Concept introduction:

In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

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Answer 4

Question

Chapter 4, Problem 4.5YT

Interpretation Introduction

Interpretation:

A molecule of ethane (H3C-CH3) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained.

Concept introduction:

In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

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Answer 5

Chapter 4, Problem 4.5YT

Interpretation Introduction

Interpretation:

A molecule of ethane (H3C-CH3) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained.

Concept introduction:

In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

Answer 6

Chapter 4, Problem 4.5YT

Interpretation Introduction

Interpretation:

A molecule of ethane (H3C-CH3) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained.

Concept introduction:

In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

Answer 7

Chapter 4, Problem 4.5YT

Interpretation Introduction

Interpretation:

A molecule of ethane (H3C-CH3) using a molecular modeling kit is to be constructed. The C-C bond is rotated so that the molecule is in an eclipsed conformation. Again the C-C bond is rotated so that now it is in a staggered conformation. Whether the C-H bonds are closer in the staggered conformation or in the eclipsed conformation is to be explained.

Concept introduction:

In Eclipsed conformations, the C-H bonds on the front carbon atom cover or eclipse those on the rear carbon atom in the Newman projections. In staggered conformations, each C-H bond on the front carbon atom bisects a pair of C-H bonds on the rear carbon, so the bonds to the front and rear carbon atoms alternate around the circle. In the staggered conformation, repulsion among the electrons in the C-H bonds is at a minimum, making this the more stable conformation. In the eclipsed conformation, that repulsion is at a maximum, making it the less stable conformation. Eclipsed conformations possess torsional strain, and staggered conformations do not.

Answer 8

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Answer 11

Ch. 4 - Prob. 4.1P Ch. 4 - Prob. 4.2P Ch. 4 - Prob. 4.3P Ch. 4 - Prob. 4.4P Ch. 4 - Prob. 4.5P Ch. 4 - Prob. 4.6P Ch. 4 - Prob. 4.7P Ch. 4 - Prob. 4.8P Ch. 4 - Prob. 4.9P Ch. 4 - Prob. 4.10P

Solution Summary: The author explains the difference between staggered and eclipsed conformations of ethane using a molecular modeling kit.

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