The strucutral formula for each of the given compound has to be proposed using the given NMR data. Concept Introduction: The 1 H N M R spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the ( N+1 ) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted. Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale. 13 C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization ( s p 3 , s p 2 , s p . , ) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the 1 H NMR spectrum.

Question

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Answer 1

Question

Chapter 21, Problem 21.30P

(a)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(a)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9BrO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+0-9-12 = 5_

From the molecular formula C9H9BrO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9BrO:

The one signal in the 13C NMR spectrum at δ 165.73 it indicates the presence of carbonyl group. The signals around at δ 131.56 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 1.39 that integrates to 3H indicates a one methyl group.

There are also one -CH2- groups one that is adjacent to other hydrogens the quartetobserved at δ 4.38. Four aromatic hydrogens are found in the doublet of doublet at δ 7.57and7.90.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- ethyl ester.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 1

(b)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(b)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C8H9NO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×8+2+1-9-02 = 5_

From the molecular formula C8H9NO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C8H9NO:

The one signal in the 13C NMR spectrum at δ 168.14 it indicates the presence of carbonyl group. The signals around at δ 139.24 and 128.51 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups one that is adjacent to other hydrogens the triplet observed at δ 9.90. Four aromatic hydrogens are found in the doublet of doublet at δ 7.30 and7.59.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- methylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 2

(c)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(c)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9NO3

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+1-9-02 = 5_

From the molecular formula C9H9NO3, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9NO3:

The one signal in the 13C NMR spectrum at δ 168.14 and 166.85 it indicates the presence of carbonyl group and acid carbonyl group. The signals around at δ 143.23 and 130.28 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups and hydroxyl group one that is not adjacent to other hydrogens the singlet observed at δ 10.3 and 12.7. Four aromatic hydrogens are found in the doublet of doublet at δ 7.91 and7.72.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is acid substituted phenylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 3

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Compound C has the molecular formula C5H8O. The IR, 1H, 13C, and DEPT NMR spectra of this compound are shown below. (a) Calculate the double bond equivalent of compound C and briefly explain what the values obtains represents. Interpret the IR spectrum. (b) Based on the information provided, determine the structure of compound D.

When compound A (C5H12O) is treated with HBr, it forms compound B (C5H11Br). The 1H NMR spectrum of compound A has a 1H singlet, a 3Hdoublet, a 6H doublet, and two 1H multiplets. The 1H NMR spectrum of compound B has a 6H singlet, a 3H triplet, and a 2H quartet. Identifycompounds A and B.

Treatment of W with CH3Li, followed by CH3I, affords compound Y(C7H14O) as the major product. Y shows a strong absorption in its IRspectrum at 1713 cm−1, and its 1H NMR spectrum is given below. (a)Propose a structure for Y. (b) Draw a stepwise mechanism for theconversion of W to Y.

Answer 2

Question

Chapter 21, Problem 21.30P

(a)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(a)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9BrO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+0-9-12 = 5_

From the molecular formula C9H9BrO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9BrO:

The one signal in the 13C NMR spectrum at δ 165.73 it indicates the presence of carbonyl group. The signals around at δ 131.56 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 1.39 that integrates to 3H indicates a one methyl group.

There are also one -CH2- groups one that is adjacent to other hydrogens the quartetobserved at δ 4.38. Four aromatic hydrogens are found in the doublet of doublet at δ 7.57and7.90.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- ethyl ester.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 1

(b)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(b)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C8H9NO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×8+2+1-9-02 = 5_

From the molecular formula C8H9NO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C8H9NO:

The one signal in the 13C NMR spectrum at δ 168.14 it indicates the presence of carbonyl group. The signals around at δ 139.24 and 128.51 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups one that is adjacent to other hydrogens the triplet observed at δ 9.90. Four aromatic hydrogens are found in the doublet of doublet at δ 7.30 and7.59.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- methylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 2

(c)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(c)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9NO3

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+1-9-02 = 5_

From the molecular formula C9H9NO3, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9NO3:

The one signal in the 13C NMR spectrum at δ 168.14 and 166.85 it indicates the presence of carbonyl group and acid carbonyl group. The signals around at δ 143.23 and 130.28 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups and hydroxyl group one that is not adjacent to other hydrogens the singlet observed at δ 10.3 and 12.7. Four aromatic hydrogens are found in the doublet of doublet at δ 7.91 and7.72.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is acid substituted phenylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 3

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Answer 3

Question

Chapter 21, Problem 21.30P

(a)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(a)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9BrO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+0-9-12 = 5_

From the molecular formula C9H9BrO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9BrO:

The one signal in the 13C NMR spectrum at δ 165.73 it indicates the presence of carbonyl group. The signals around at δ 131.56 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 1.39 that integrates to 3H indicates a one methyl group.

There are also one -CH2- groups one that is adjacent to other hydrogens the quartetobserved at δ 4.38. Four aromatic hydrogens are found in the doublet of doublet at δ 7.57and7.90.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- ethyl ester.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 1

(b)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(b)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C8H9NO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×8+2+1-9-02 = 5_

From the molecular formula C8H9NO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C8H9NO:

The one signal in the 13C NMR spectrum at δ 168.14 it indicates the presence of carbonyl group. The signals around at δ 139.24 and 128.51 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups one that is adjacent to other hydrogens the triplet observed at δ 9.90. Four aromatic hydrogens are found in the doublet of doublet at δ 7.30 and7.59.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- methylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 2

(c)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(c)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9NO3

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+1-9-02 = 5_

From the molecular formula C9H9NO3, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9NO3:

The one signal in the 13C NMR spectrum at δ 168.14 and 166.85 it indicates the presence of carbonyl group and acid carbonyl group. The signals around at δ 143.23 and 130.28 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups and hydroxyl group one that is not adjacent to other hydrogens the singlet observed at δ 10.3 and 12.7. Four aromatic hydrogens are found in the doublet of doublet at δ 7.91 and7.72.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is acid substituted phenylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 3

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Answer 4

Question

Chapter 21, Problem 21.30P

(a)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(a)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9BrO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+0-9-12 = 5_

From the molecular formula C9H9BrO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9BrO:

The one signal in the 13C NMR spectrum at δ 165.73 it indicates the presence of carbonyl group. The signals around at δ 131.56 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 1.39 that integrates to 3H indicates a one methyl group.

There are also one -CH2- groups one that is adjacent to other hydrogens the quartetobserved at δ 4.38. Four aromatic hydrogens are found in the doublet of doublet at δ 7.57and7.90.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- ethyl ester.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 1

(b)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(b)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C8H9NO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×8+2+1-9-02 = 5_

From the molecular formula C8H9NO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C8H9NO:

The one signal in the 13C NMR spectrum at δ 168.14 it indicates the presence of carbonyl group. The signals around at δ 139.24 and 128.51 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups one that is adjacent to other hydrogens the triplet observed at δ 9.90. Four aromatic hydrogens are found in the doublet of doublet at δ 7.30 and7.59.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- methylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 2

(c)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(c)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9NO3

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+1-9-02 = 5_

From the molecular formula C9H9NO3, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9NO3:

The one signal in the 13C NMR spectrum at δ 168.14 and 166.85 it indicates the presence of carbonyl group and acid carbonyl group. The signals around at δ 143.23 and 130.28 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups and hydroxyl group one that is not adjacent to other hydrogens the singlet observed at δ 10.3 and 12.7. Four aromatic hydrogens are found in the doublet of doublet at δ 7.91 and7.72.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is acid substituted phenylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 3

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Answer 5

Chapter 21, Problem 21.30P

(a)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(a)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9BrO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+0-9-12 = 5_

From the molecular formula C9H9BrO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9BrO:

The one signal in the 13C NMR spectrum at δ 165.73 it indicates the presence of carbonyl group. The signals around at δ 131.56 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 1.39 that integrates to 3H indicates a one methyl group.

There are also one -CH2- groups one that is adjacent to other hydrogens the quartetobserved at δ 4.38. Four aromatic hydrogens are found in the doublet of doublet at δ 7.57and7.90.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- ethyl ester.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 1

(b)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(b)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C8H9NO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×8+2+1-9-02 = 5_

From the molecular formula C8H9NO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C8H9NO:

The one signal in the 13C NMR spectrum at δ 168.14 it indicates the presence of carbonyl group. The signals around at δ 139.24 and 128.51 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups one that is adjacent to other hydrogens the triplet observed at δ 9.90. Four aromatic hydrogens are found in the doublet of doublet at δ 7.30 and7.59.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- methylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 2

(c)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(c)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9NO3

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+1-9-02 = 5_

From the molecular formula C9H9NO3, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9NO3:

The one signal in the 13C NMR spectrum at δ 168.14 and 166.85 it indicates the presence of carbonyl group and acid carbonyl group. The signals around at δ 143.23 and 130.28 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups and hydroxyl group one that is not adjacent to other hydrogens the singlet observed at δ 10.3 and 12.7. Four aromatic hydrogens are found in the doublet of doublet at δ 7.91 and7.72.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is acid substituted phenylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 3

Answer 6

Chapter 21, Problem 21.30P

(a)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(a)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9BrO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+0-9-12 = 5_

From the molecular formula C9H9BrO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9BrO:

The one signal in the 13C NMR spectrum at δ 165.73 it indicates the presence of carbonyl group. The signals around at δ 131.56 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 1.39 that integrates to 3H indicates a one methyl group.

There are also one -CH2- groups one that is adjacent to other hydrogens the quartetobserved at δ 4.38. Four aromatic hydrogens are found in the doublet of doublet at δ 7.57and7.90.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- ethyl ester.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 1

Answer 7

Chapter 21, Problem 21.30P

(a)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

Answer 8

(a)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9BrO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+0-9-12 = 5_

From the molecular formula C9H9BrO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9BrO:

The one signal in the 13C NMR spectrum at δ 165.73 it indicates the presence of carbonyl group. The signals around at δ 131.56 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 1.39 that integrates to 3H indicates a one methyl group.

There are also one -CH2- groups one that is adjacent to other hydrogens the quartetobserved at δ 4.38. Four aromatic hydrogens are found in the doublet of doublet at δ 7.57and7.90.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- ethyl ester.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 1

Answer 9

(a)

Expert Solution

Answer 10

(a)

Expert Solution

Answer 11

Expert Solution

Answer 12

(b)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(b)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C8H9NO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×8+2+1-9-02 = 5_

From the molecular formula C8H9NO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C8H9NO:

The one signal in the 13C NMR spectrum at δ 168.14 it indicates the presence of carbonyl group. The signals around at δ 139.24 and 128.51 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups one that is adjacent to other hydrogens the triplet observed at δ 9.90. Four aromatic hydrogens are found in the doublet of doublet at δ 7.30 and7.59.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- methylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 2

Answer 13

(b)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

Answer 14

(b)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C8H9NO

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×8+2+1-9-02 = 5_

From the molecular formula C8H9NO, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C8H9NO:

The one signal in the 13C NMR spectrum at δ 168.14 it indicates the presence of carbonyl group. The signals around at δ 139.24 and 128.51 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups one that is adjacent to other hydrogens the triplet observed at δ 9.90. Four aromatic hydrogens are found in the doublet of doublet at δ 7.30 and7.59.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is 4-Bromo-1- methylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 2

Answer 15

(b)

Expert Solution

Answer 16

(b)

Expert Solution

Answer 17

Expert Solution

Answer 18

(c)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

(c)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9NO3

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+1-9-02 = 5_

From the molecular formula C9H9NO3, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9NO3:

The one signal in the 13C NMR spectrum at δ 168.14 and 166.85 it indicates the presence of carbonyl group and acid carbonyl group. The signals around at δ 143.23 and 130.28 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups and hydroxyl group one that is not adjacent to other hydrogens the singlet observed at δ 10.3 and 12.7. Four aromatic hydrogens are found in the doublet of doublet at δ 7.91 and7.72.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is acid substituted phenylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 3

Answer 19

(c)

Interpretation Introduction

Interpretation:

The strucutral formula for each of the given compound has to be proposed using the given NMR data.

Concept Introduction:

The 1H NMR spectrum of a compound provides some vital information that is required to predict the structure of the compound. The chemical shift values can predict the groups that are present in the molecule. The splitting of signals by the (N+1) rule predicts the number of hydrogens or protons attached to the adjacent carbon in a carbon chain of a compound. Withthis information, the structure of the compound can be predicted.

Chemical shift: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

¹³C NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule (n+1) C. The chemical shift explains the different hybridization (sp3, sp2, sp.,) of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ¹H NMR spectrum.

Answer 20

(c)

Expert Solution

Explanation of Solution

Index of Hydrogen Deficiency (IHD) calculation,

Given molecular formula F is C9H9NO3

We calculate the IHD as follows:

HDI = ( 2C+2+N-H-X)2 = 2×9+2+1-9-02 = 5_

From the molecular formula C9H9NO3, there is an index of hydrogen deficiency of five, which is accounted for by the three double bonds and ring of the benzene ring plus the π bond of the carbonyl group in corresponding molecular formula.

1H NMR and 13C NMR analysis for given molecular formula C9H9NO3:

The one signal in the 13C NMR spectrum at δ 168.14 and 166.85 it indicates the presence of carbonyl group and acid carbonyl group. The signals around at δ 143.23 and 130.28 indicates there is an aromatic ring. The one triplet in the 1H NMR at δ 2.06 that integrates to 3H indicates a one methyl group.

There are also one -NH- groups and hydroxyl group one that is not adjacent to other hydrogens the singlet observed at δ 10.3 and 12.7. Four aromatic hydrogens are found in the doublet of doublet at δ 7.91 and7.72.

Therefore, the based on above spectral details the structure that is consistent with the all of these facts is acid substituted phenylacetamide.

Organic Chemistry, Chapter 21, Problem 21.30P , additional homework tip 3