For the given compounds, number of signals in 13 C NMR spectrum should be found Concept introduction: The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13 C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring. The 13 C NMR spectrum gives information on the different electronic environments of carbon. As like 1 H NMR , the number of signals generated in 13 C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13 C − 13 C nuclei are weakly involved due to the low abundance of 13 C isotopes of carbon atom.

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Answer 1

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Chapter 18, Problem 48PP

Interpretation Introduction

Interpretation: For the given compounds, number of signals in 13C NMR spectrum should be found

Concept introduction:

The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring.

The 13C NMR spectrum gives information on the different electronic environments of carbon. As like 1H NMR , the number of signals generated in 13C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13C−13C nuclei are weakly involved due to the low abundance of 13C isotopes of carbon atom.

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Answer 2

Question

Chapter 18, Problem 48PP

Interpretation Introduction

Interpretation: For the given compounds, number of signals in 13C NMR spectrum should be found

Concept introduction:

The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring.

The 13C NMR spectrum gives information on the different electronic environments of carbon. As like 1H NMR , the number of signals generated in 13C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13C−13C nuclei are weakly involved due to the low abundance of 13C isotopes of carbon atom.

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Answer 3

Question

Chapter 18, Problem 48PP

Interpretation Introduction

Interpretation: For the given compounds, number of signals in 13C NMR spectrum should be found

Concept introduction:

The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring.

The 13C NMR spectrum gives information on the different electronic environments of carbon. As like 1H NMR , the number of signals generated in 13C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13C−13C nuclei are weakly involved due to the low abundance of 13C isotopes of carbon atom.

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Answer 4

Question

Chapter 18, Problem 48PP

Interpretation Introduction

Interpretation: For the given compounds, number of signals in 13C NMR spectrum should be found

Concept introduction:

The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring.

The 13C NMR spectrum gives information on the different electronic environments of carbon. As like 1H NMR , the number of signals generated in 13C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13C−13C nuclei are weakly involved due to the low abundance of 13C isotopes of carbon atom.

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Answer 5

Chapter 18, Problem 48PP

Interpretation Introduction

Interpretation: For the given compounds, number of signals in 13C NMR spectrum should be found

Concept introduction:

The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring.

The 13C NMR spectrum gives information on the different electronic environments of carbon. As like 1H NMR , the number of signals generated in 13C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13C−13C nuclei are weakly involved due to the low abundance of 13C isotopes of carbon atom.

Answer 6

Chapter 18, Problem 48PP

Interpretation Introduction

Interpretation: For the given compounds, number of signals in 13C NMR spectrum should be found

Concept introduction:

The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring.

The 13C NMR spectrum gives information on the different electronic environments of carbon. As like 1H NMR , the number of signals generated in 13C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13C−13C nuclei are weakly involved due to the low abundance of 13C isotopes of carbon atom.

Answer 7

Chapter 18, Problem 48PP

Interpretation Introduction

Interpretation: For the given compounds, number of signals in 13C NMR spectrum should be found

Concept introduction:

The carbon atoms of aromatic rings typically produce signals in the range of 100-150ppm in 13C NMR spectrum. The number of signals is very helpful in determining the specific substitution for substituted aromatic ring.

The 13C NMR spectrum gives information on the different electronic environments of carbon. As like 1H NMR , the number of signals generated in 13C NMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13C−13C nuclei are weakly involved due to the low abundance of 13C isotopes of carbon atom.

Answer 8

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Answer 11

Ch. 18.2 - Prob. 1LTS Ch. 18.2 - Prob. 1PTS Ch. 18.2 - Prob. 2ATS Ch. 18.2 - Prob. 3ATS Ch. 18.2 - Prob. 4ATS Ch. 18.2 - Prob. 5ATS Ch. 18.4 - Prob. 6CC Ch. 18.4 - Prob. 8CC Ch. 18.4 - Prob. 9CC Ch. 18.5 - Prob. 10CC

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Chapter 18 Solutions