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

Want to see more full solutions like this?

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

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

Acid Catalyzed Aromatization of Carvone: 1. Starting with the ketone, below, draw a mechanism for the reaction to give the phenol as shown. H2SO4 HO- H₂O 2. Why do we use CDCl instead of CHCl, for acquiring our NMR spectra? 3. Why does it not matter which enantiomer of carvone is used for this reaction? What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?

Assign this H NMR

Please complete these blanks need that asap

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

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

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

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

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

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

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