For the spectrum of DMF molecule, the three signals in 1 H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in 13 C NMR are to be determined. Concept introduction: LAH in water is reducing reagent . It will reduce the carbonyl group to methyl group. 1 H NMR Spectroscopy: The 1 H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules. 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.

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Answer 1

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Chapter 21, Problem 83IP

Interpretation Introduction

Interpretation:

For the spectrum of DMF molecule, the three signals in ¹H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in ¹³C NMR are to be determined.

Concept introduction:

LAH in water is reducing reagent. It will reduce the carbonyl group to methyl group.

¹H NMR Spectroscopy: The ¹H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules.

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.

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Answer 2

Question

Chapter 21, Problem 83IP

Interpretation Introduction

Interpretation:

For the spectrum of DMF molecule, the three signals in ¹H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in ¹³C NMR are to be determined.

Concept introduction:

LAH in water is reducing reagent. It will reduce the carbonyl group to methyl group.

¹H NMR Spectroscopy: The ¹H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules.

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.

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Answer 3

Question

Chapter 21, Problem 83IP

Interpretation Introduction

Interpretation:

For the spectrum of DMF molecule, the three signals in ¹H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in ¹³C NMR are to be determined.

Concept introduction:

LAH in water is reducing reagent. It will reduce the carbonyl group to methyl group.

¹H NMR Spectroscopy: The ¹H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules.

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.

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Answer 4

Question

Chapter 21, Problem 83IP

Interpretation Introduction

Interpretation:

For the spectrum of DMF molecule, the three signals in ¹H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in ¹³C NMR are to be determined.

Concept introduction:

LAH in water is reducing reagent. It will reduce the carbonyl group to methyl group.

¹H NMR Spectroscopy: The ¹H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules.

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.

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Answer 5

Chapter 21, Problem 83IP

Interpretation Introduction

Interpretation:

For the spectrum of DMF molecule, the three signals in ¹H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in ¹³C NMR are to be determined.

Concept introduction:

LAH in water is reducing reagent. It will reduce the carbonyl group to methyl group.

¹H NMR Spectroscopy: The ¹H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules.

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 6

Chapter 21, Problem 83IP

Interpretation Introduction

Interpretation:

For the spectrum of DMF molecule, the three signals in ¹H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in ¹³C NMR are to be determined.

Concept introduction:

LAH in water is reducing reagent. It will reduce the carbonyl group to methyl group.

¹H NMR Spectroscopy: The ¹H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules.

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 7

Chapter 21, Problem 83IP

Interpretation Introduction

Interpretation:

For the spectrum of DMF molecule, the three signals in ¹H NMR is changed to one signal when DMF is treated with LAH followed by water, the number of signals in ¹³C NMR are to be determined.

Concept introduction:

LAH in water is reducing reagent. It will reduce the carbonyl group to methyl group.

¹H NMR Spectroscopy: The ¹H NMR (or) single hydrogen (H) is the application of NMR spectra with respect to electronic environment of hydrogen nuclei within the molecules, in order to determine the structure of the molecules.

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

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Answer 11

Ch. 21.2 - Prob. 1CC Ch. 21.2 - Prob. 2CC Ch. 21.2 - Prob. 3CC Ch. 21.3 - Prob. 4CC Ch. 21.3 - Prob. 5CC Ch. 21.3 - Prob. 6CC Ch. 21.3 - Prob. 7CC Ch. 21.3 - Prob. 8CC Ch. 21.3 - Prob. 9CC Ch. 21.4 - Prob. 10CC

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Chapter 21 Solutions