The number of different kinds of protons present in toluene. Interpretation: The number of different kinds of protons present in toluene is to be determined. Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

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Answer 1

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Chapter 13.6, Problem 13.4P

(a)

Interpretation Introduction

To determine: The number of different kinds of protons present in toluene.

Interpretation: The number of different kinds of protons present in toluene is to be determined.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

(b)

Interpretation Introduction

To explain: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption.

Interpretation: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption is to be explained.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

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Answer 2

Question

Chapter 13.6, Problem 13.4P

(a)

Interpretation Introduction

To determine: The number of different kinds of protons present in toluene.

Interpretation: The number of different kinds of protons present in toluene is to be determined.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

(b)

Interpretation Introduction

To explain: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption.

Interpretation: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption is to be explained.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

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Answer 3

Question

Chapter 13.6, Problem 13.4P

(a)

Interpretation Introduction

To determine: The number of different kinds of protons present in toluene.

Interpretation: The number of different kinds of protons present in toluene is to be determined.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

(b)

Interpretation Introduction

To explain: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption.

Interpretation: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption is to be explained.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

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Answer 4

Question

Chapter 13.6, Problem 13.4P

(a)

Interpretation Introduction

To determine: The number of different kinds of protons present in toluene.

Interpretation: The number of different kinds of protons present in toluene is to be determined.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

(b)

Interpretation Introduction

To explain: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption.

Interpretation: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption is to be explained.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

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Answer 5

Chapter 13.6, Problem 13.4P

(a)

Interpretation Introduction

To determine: The number of different kinds of protons present in toluene.

Interpretation: The number of different kinds of protons present in toluene is to be determined.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

(b)

Interpretation Introduction

To explain: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption.

Interpretation: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption is to be explained.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

Answer 6

Chapter 13.6, Problem 13.4P

(a)

Interpretation Introduction

To determine: The number of different kinds of protons present in toluene.

Interpretation: The number of different kinds of protons present in toluene is to be determined.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

Answer 7

Chapter 13.6, Problem 13.4P

(a)

Interpretation Introduction

To determine: The number of different kinds of protons present in toluene.

Interpretation: The number of different kinds of protons present in toluene is to be determined.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

Answer 8

(b)

Interpretation Introduction

To explain: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption.

Interpretation: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption is to be explained.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

Answer 9

(b)

Interpretation Introduction

To explain: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption.

Interpretation: The reason as to why the aromatic region around δ 7.2 is broad, with more than one sharp absorption is to be explained.

Concept introduction: The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 13.5A - In a 300-MHz spectrometer, the protons in...Ch. 13.5B - Prob. 13.2P Ch. 13.6 - Determine the number of different kinds of protons...Ch. 13.6 - Prob. 13.4P Ch. 13.7 - Draw the integral trace expected for the NMR...Ch. 13.7 - Prob. 13.6P Ch. 13.8C - Draw the NMR spectra you would expect for the...Ch. 13.8D - Draw the NMR spectra you expect for the following...Ch. 13.8D - a. Assign protons to the peaks in the NMR spectrum...Ch. 13.8D - Prob. 13.10P

Solution Summary: The author explains the chemical shift, which is measured in parts per million and is a dimensionless quantity. The aromatic protons are deshielded by an effective ring of electrons.

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