Chapter 14, Problem 14.42P

Interpretation Introduction

(a)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into doublet and quartet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

In the given compound, carbon atom of labeled proton ${\text{H}}_{\text{a}}$ is bonded to another carbon atom on which one hydrogen atom is present whereas carbon atom of labeled proton ${\text{H}}_{\text{b}}$ is bonded to another carbon atom on which three hydrogen atoms are present. Hence, the signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into doublet and quartet, respectively.

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into doublet and quartet, respectively.

Interpretation Introduction

(b)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into triplet.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

In the given compound, carbon atom of labeled proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ is bonded to another carbon atom on which two hydrogen atoms are present. Hence, the signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into triplet.

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into triplet.

Interpretation Introduction

(c)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into doublet and triplet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

In the given compound, carbon atom of labeled proton ${\text{H}}_{\text{a}}$ is bonded to another carbon atom on which one hydrogen atom is present whereas carbon atom of labeled proton ${\text{H}}_{\text{b}}$ is bonded to another carbon atom on which two hydrogen atoms are present. Hence, the signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into doublet and triplet, respectively.

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into doublet and triplet, respectively.

Interpretation Introduction

(d)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into doublet, septet, quartet and triplet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

In the given compound, carbon atom of labeled proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ is bonded to another carbon atom on which one, six, three and two hydrogen atom is present Hence, the signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into doublet, septet, quartet and triplet, respectively.

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into doublet, septet, quartet and triplet, respectively.

Interpretation Introduction

(e)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into doublet, septet, quartet and triplet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

In the given compound, carbon atom of labeled proton ${\text{H}}_{\text{a}}$ is bonded to two carbon atoms on which two hydrogen atoms are present whereas carbon atom of labeled proton ${\text{H}}_{\text{b}}$ is bonded to another carbon atom on which two hydrogen atoms are present. Hence, the signal of proton ${\text{H}}_{\text{a}}$ and proton ${\text{H}}_{\text{b}}$ will split into pentet and triplet, respectively.

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into doublet, septet, quartet and triplet, respectively.

Interpretation Introduction

(f)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into triplet, sextet, pentet and triplet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

The splitting pattern shown by each labeled proton is show in Figure 1.

Figure 1

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into triplet, sextet, pentet and triplet, respectively.

Interpretation Introduction

(g)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into triplet, sextet, pentet and triplet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

The splitting pattern shown by each labeled proton is show in Figure 2.

Figure 2

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, ${\text{H}}_{\text{c}}$ and ${\text{H}}_{\text{d}}$ will split into triplet, sextet, pentet and triplet, respectively.

Interpretation Introduction

(h)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$ and ${\text{H}}_{\text{b}}$ will split into pentet and triplet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

The splitting pattern shown by each labeled proton is show in Figure 3.

Figure 3

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$ and ${\text{H}}_{\text{b}}$ will split into pentet and triplet, respectively.

Interpretation Introduction

(i)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$ and ${\text{H}}_{\text{b}}$ will split into doublet.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

The splitting pattern shown by each labeled proton is show in Figure 4.

Figure 4

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$ and ${\text{H}}_{\text{b}}$ will split into doublet.

Interpretation Introduction

(j)

Interpretation: The number of peaks into which each single of labeled proton will split is to be predicted.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. Proton NMR spectroscopy identifies the number of hydrogen atoms present in a molecule and the nature of the functional group. The value of chemical peaks depends upon the chemical environment around the hydrogen atom.

Answer to Problem 14.42P

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$ and ${\text{H}}_{\text{c}}$ will split into multiplet, doublet and doublet, respectively.

Explanation of Solution

In NMR spectroscopy, splitting of signal takes place according to number of protons present on neighboring carbon atom. The number of peaks into which a signal will split is $n+1$. Here, $n$ is the number of protons present on neighboring carbon atom.

The splitting pattern shown by each labeled proton is show in Figure 5.

Figure 5

Conclusion

The signal of proton ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$ and ${\text{H}}_{\text{c}}$ will split into multiplet, doublet and doublet, respectively.