(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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(f) SO: Best Lewis Structure 3 e group geometry:_ shape/molecular geometry:, (g) CF2CF2 Best Lewis Structure polarity: e group arrangement:_ shape/molecular geometry: (h) (NH4)2SO4 Best Lewis Structure polarity: e group arrangement: shape/molecular geometry: polarity: Sketch (with angles): Sketch (with angles): Sketch (with angles):

1. Problem Set 3b Chem 141 For each of the following compounds draw the BEST Lewis Structure then sketch the molecule (showing bond angles). Identify (i) electron group geometry (ii) shape around EACH central atom (iii) whether the molecule is polar or non-polar (iv) (a) SeF4 Best Lewis Structure e group arrangement:_ shape/molecular geometry: polarity: (b) AsOBr3 Best Lewis Structure e group arrangement:_ shape/molecular geometry: polarity: Sketch (with angles): Sketch (with angles):

(c) SOCI Best Lewis Structure 2 e group arrangement: shape/molecular geometry:_ (d) PCls Best Lewis Structure polarity: e group geometry:_ shape/molecular geometry:_ (e) Ba(BrO2): Best Lewis Structure polarity: e group arrangement: shape/molecular geometry: polarity: Sketch (with angles): Sketch (with angles): Sketch (with angles):

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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