(a) Interpretation: Enantiomeric excess of the given solution is to be calculated. Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

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Answer 1

Question

Chapter 5, Problem 68P

Interpretation Introduction

(a)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(b)

Interpretation: The percent of each enantiomer in the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(c)

Interpretation: The specific rotation [α] for the enantiomer of quinine is to be predicted.

Concept introduction: Enantiomers are stereoisomers, which are non-superimposable images of each other. They have identical physical and chemical properties in symmetric environment. They rotate the plane-polarized light in equal amounts and in opposite directions.

Interpretation Introduction

(d)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(e)

Interpretation: The [α] value for the solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

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3. Consider the compounds below and determine if they are aromatic, antiaromatic, or non-aromatic. In case of aromatic or anti-aromatic, please indicate number of I electrons in the respective systems. (Hint: 1. Not all lone pair electrons were explicitly drawn and you should be able to tell that the bonding electrons and lone pair electrons should reside in which hybridized atomic orbital 2. You should consider ring strain- flexibility and steric repulsion that facilitates adoption of aromaticity or avoidance of anti- aromaticity) H H N N: NH2 N Aromaticity (Circle) Aromatic Aromatic Aromatic Aromatic Aromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic nonaromatic nonaromatic nonaromatic nonaromatic nonaromatic aromatic TT electrons Me H Me Aromaticity (Circle) Aromatic Aromatic Aromatic Aromatic Aromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic nonaromatic nonaromatic nonaromatic nonaromatic nonaromatic aromatic πT electrons H HH…

A chemistry graduate student is studying the rate of this reaction: 2 HI (g) →H2(g) +12(g) She fills a reaction vessel with HI and measures its concentration as the reaction proceeds: time (minutes) [IH] 0 0.800M 1.0 0.301 M 2.0 0.185 M 3.0 0.134M 4.0 0.105 M Use this data to answer the following questions. Write the rate law for this reaction. rate = 0 Calculate the value of the rate constant k. k = Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol.

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Answer 2

Question

Chapter 5, Problem 68P

Interpretation Introduction

(a)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(b)

Interpretation: The percent of each enantiomer in the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(c)

Interpretation: The specific rotation [α] for the enantiomer of quinine is to be predicted.

Concept introduction: Enantiomers are stereoisomers, which are non-superimposable images of each other. They have identical physical and chemical properties in symmetric environment. They rotate the plane-polarized light in equal amounts and in opposite directions.

Interpretation Introduction

(d)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(e)

Interpretation: The [α] value for the solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

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Answer 3

Question

Chapter 5, Problem 68P

Interpretation Introduction

(a)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(b)

Interpretation: The percent of each enantiomer in the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(c)

Interpretation: The specific rotation [α] for the enantiomer of quinine is to be predicted.

Concept introduction: Enantiomers are stereoisomers, which are non-superimposable images of each other. They have identical physical and chemical properties in symmetric environment. They rotate the plane-polarized light in equal amounts and in opposite directions.

Interpretation Introduction

(d)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(e)

Interpretation: The [α] value for the solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

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Answer 4

Question

Chapter 5, Problem 68P

Interpretation Introduction

(a)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(b)

Interpretation: The percent of each enantiomer in the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(c)

Interpretation: The specific rotation [α] for the enantiomer of quinine is to be predicted.

Concept introduction: Enantiomers are stereoisomers, which are non-superimposable images of each other. They have identical physical and chemical properties in symmetric environment. They rotate the plane-polarized light in equal amounts and in opposite directions.

Interpretation Introduction

(d)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(e)

Interpretation: The [α] value for the solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

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Answer 5

Chapter 5, Problem 68P

Interpretation Introduction

(a)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(b)

Interpretation: The percent of each enantiomer in the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(c)

Interpretation: The specific rotation [α] for the enantiomer of quinine is to be predicted.

Concept introduction: Enantiomers are stereoisomers, which are non-superimposable images of each other. They have identical physical and chemical properties in symmetric environment. They rotate the plane-polarized light in equal amounts and in opposite directions.

Interpretation Introduction

(d)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Interpretation Introduction

(e)

Interpretation: The [α] value for the solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 6

Chapter 5, Problem 68P

Interpretation Introduction

(a)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 7

Chapter 5, Problem 68P

Interpretation Introduction

(a)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 8

Interpretation Introduction

(b)

Interpretation: The percent of each enantiomer in the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 9

Interpretation Introduction

(b)

Interpretation: The percent of each enantiomer in the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 10

Interpretation Introduction

(c)

Interpretation: The specific rotation [α] for the enantiomer of quinine is to be predicted.

Concept introduction: Enantiomers are stereoisomers, which are non-superimposable images of each other. They have identical physical and chemical properties in symmetric environment. They rotate the plane-polarized light in equal amounts and in opposite directions.

Answer 11

Interpretation Introduction

(c)

Interpretation: The specific rotation [α] for the enantiomer of quinine is to be predicted.

Concept introduction: Enantiomers are stereoisomers, which are non-superimposable images of each other. They have identical physical and chemical properties in symmetric environment. They rotate the plane-polarized light in equal amounts and in opposite directions.

Answer 12

Interpretation Introduction

(d)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 13

Interpretation Introduction

(d)

Interpretation: Enantiomeric excess of the given solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 14

Interpretation Introduction

(e)

Interpretation: The [α] value for the solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 15

Interpretation Introduction

(e)

Interpretation: The [α] value for the solution is to be calculated.

Concept introduction: Enantiomeric excess is the excess of major enantiomer over the minor enantiomer. Enantiomeric excess is equivalent to the optical purity. Enantiomeric excess is the fraction of observed rotation of the mixture to specific rotation of the pure enantiomer.

Answer 16

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Answer 17

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Answer 18

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Answer 19

Ch. 5.1 - Prob. 1P Ch. 5.2 - Prob. 2P Ch. 5.3 - Draw the mirror image of each compound. Label each...Ch. 5.3 - Prob. 4P Ch. 5.3 - A molecule is achiral if it has a plane of...Ch. 5.6 - Prob. 17P Ch. 5.6 - Prob. 18P Ch. 5.7 - Prob. 19P Ch. 5.7 - Prob. 20P Ch. 5.7 - Problem 5.18 Compounds E and F are two isomers of...

Solution Summary: The author explains that the enantiomeric excess of the given solution is equivalent to the optical purity.

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