(a) Interpretation: The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn. Concept introduction: A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

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Answer 1

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Chapter 4, Problem 4.29P

Interpretation Introduction

(a)

Interpretation:

The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn.

Concept introduction:

A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

Interpretation Introduction

(b)

Interpretation:

The more stable configuration out of the two shown is to be identified.

Concept introduction:

The stability of cyclic hydrocarbons depends on two factors – ring strain and torsional strain. With only three ring carbons, the ring is an equilateral triangle, with 60o bond angles. The bonds to all the atoms/groups attached to the ring are eclipsed bonds, which also introduce considerable torsional strain.

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Students have asked these similar questions

Draw Newman projects of all the staggered conformations for the molecule below looking along the bolded bond in the direction indicated by the arrow. The carbon closest to the arrow should be the front carbon of your Newman projection. (It is a practice problem from the book but I am confused about how to approach it.)

a. Draw the Newman projection for each molecule shown here, looking down the c-c bond indicated by the arrow. b. Which configuration do you think is more stable? Explain.

Draw each of the following. (a) Draw a Newman Projection of the following molecule, looking down the C3-C4 bond. Draw C3 in the front. CI Br H (b) Draw a Newman Projection of the most stable and the least stable conformation of the following molecule. Label each H H. CI H CI H

Answer 2

Question

Chapter 4, Problem 4.29P

Interpretation Introduction

(a)

Interpretation:

The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn.

Concept introduction:

A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

Interpretation Introduction

(b)

Interpretation:

The more stable configuration out of the two shown is to be identified.

Concept introduction:

The stability of cyclic hydrocarbons depends on two factors – ring strain and torsional strain. With only three ring carbons, the ring is an equilateral triangle, with 60o bond angles. The bonds to all the atoms/groups attached to the ring are eclipsed bonds, which also introduce considerable torsional strain.

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Answer 3

Question

Chapter 4, Problem 4.29P

Interpretation Introduction

(a)

Interpretation:

The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn.

Concept introduction:

A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

Interpretation Introduction

(b)

Interpretation:

The more stable configuration out of the two shown is to be identified.

Concept introduction:

The stability of cyclic hydrocarbons depends on two factors – ring strain and torsional strain. With only three ring carbons, the ring is an equilateral triangle, with 60o bond angles. The bonds to all the atoms/groups attached to the ring are eclipsed bonds, which also introduce considerable torsional strain.

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Answer 4

Question

Chapter 4, Problem 4.29P

Interpretation Introduction

(a)

Interpretation:

The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn.

Concept introduction:

A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

Interpretation Introduction

(b)

Interpretation:

The more stable configuration out of the two shown is to be identified.

Concept introduction:

The stability of cyclic hydrocarbons depends on two factors – ring strain and torsional strain. With only three ring carbons, the ring is an equilateral triangle, with 60o bond angles. The bonds to all the atoms/groups attached to the ring are eclipsed bonds, which also introduce considerable torsional strain.

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Answer 5

Chapter 4, Problem 4.29P

Interpretation Introduction

(a)

Interpretation:

The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn.

Concept introduction:

A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

Interpretation Introduction

(b)

Interpretation:

The more stable configuration out of the two shown is to be identified.

Concept introduction:

The stability of cyclic hydrocarbons depends on two factors – ring strain and torsional strain. With only three ring carbons, the ring is an equilateral triangle, with 60o bond angles. The bonds to all the atoms/groups attached to the ring are eclipsed bonds, which also introduce considerable torsional strain.

Answer 6

Chapter 4, Problem 4.29P

Interpretation Introduction

(a)

Interpretation:

The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn.

Concept introduction:

A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

Answer 7

Chapter 4, Problem 4.29P

Interpretation Introduction

(a)

Interpretation:

The Newman projections of cis-1, 2-dimethylcyclopropane and trans-1, 2-dimethylcyclopropane are to be drawn.

Concept introduction:

A Newman projection visualizes the conformation of a molecule about a chemical bond from front to back. The front carbon is represented by a dot and back carbon by a circle. Then remaining atoms would be drawn as they are attached to respective carbon atoms. The bonds to the front carbon converge on the dot while the bonds to the back carbon end at the circle.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The more stable configuration out of the two shown is to be identified.

Concept introduction:

The stability of cyclic hydrocarbons depends on two factors – ring strain and torsional strain. With only three ring carbons, the ring is an equilateral triangle, with 60o bond angles. The bonds to all the atoms/groups attached to the ring are eclipsed bonds, which also introduce considerable torsional strain.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The more stable configuration out of the two shown is to be identified.

Concept introduction:

The stability of cyclic hydrocarbons depends on two factors – ring strain and torsional strain. With only three ring carbons, the ring is an equilateral triangle, with 60o bond angles. The bonds to all the atoms/groups attached to the ring are eclipsed bonds, which also introduce considerable torsional strain.

Answer 10

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Answer 12

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Answer 13

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

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