All the significant stretching frequencies above 1580 cm − 1 for each given spectrums are to be interpreted. Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light . Alkanes , alkenes and alkynes have characteristic C − H stretching frequencies. Isolated alkenes have value 1640 − 1680 cm − 1 and that of conjugated alkenes have 1620 − 1640 cm − 1 frequencies. The energy required to stretch a bond is more as compared to that of bending of a bond. C − H , N − H and O − H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms. To determine: All the significant stretching frequencies above 1580 cm − 1 for each given spectrums.

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Answer 1

Question

Chapter 12.12, Problem 12.6P

Interpretation Introduction

Interpretation: All the significant stretching frequencies above 1580 cm−1 for each given spectrums are to be interpreted.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic C−H stretching frequencies. Isolated alkenes have value 1640−1680 cm−1 and that of conjugated alkenes have 1620−1640 cm−1 frequencies.

The energy required to stretch a bond is more as compared to that of bending of a bond. C−H, N−H and O−H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms.

To determine: All the significant stretching frequencies above 1580 cm−1 for each given spectrums.

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a. If two signals differ by 1.5 ppm in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer? b. If two signals differ by 90 Hz in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer?

Answer 2

Question

Chapter 12.12, Problem 12.6P

Interpretation Introduction

Interpretation: All the significant stretching frequencies above 1580 cm−1 for each given spectrums are to be interpreted.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic C−H stretching frequencies. Isolated alkenes have value 1640−1680 cm−1 and that of conjugated alkenes have 1620−1640 cm−1 frequencies.

The energy required to stretch a bond is more as compared to that of bending of a bond. C−H, N−H and O−H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms.

To determine: All the significant stretching frequencies above 1580 cm−1 for each given spectrums.

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Check out a sample textbook solution

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Answer 3

Question

Chapter 12.12, Problem 12.6P

Interpretation Introduction

Interpretation: All the significant stretching frequencies above 1580 cm−1 for each given spectrums are to be interpreted.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic C−H stretching frequencies. Isolated alkenes have value 1640−1680 cm−1 and that of conjugated alkenes have 1620−1640 cm−1 frequencies.

The energy required to stretch a bond is more as compared to that of bending of a bond. C−H, N−H and O−H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms.

To determine: All the significant stretching frequencies above 1580 cm−1 for each given spectrums.

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Answer 4

Question

Chapter 12.12, Problem 12.6P

Interpretation Introduction

Interpretation: All the significant stretching frequencies above 1580 cm−1 for each given spectrums are to be interpreted.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic C−H stretching frequencies. Isolated alkenes have value 1640−1680 cm−1 and that of conjugated alkenes have 1620−1640 cm−1 frequencies.

The energy required to stretch a bond is more as compared to that of bending of a bond. C−H, N−H and O−H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms.

To determine: All the significant stretching frequencies above 1580 cm−1 for each given spectrums.

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Answer 5

Chapter 12.12, Problem 12.6P

Interpretation Introduction

Interpretation: All the significant stretching frequencies above 1580 cm−1 for each given spectrums are to be interpreted.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic C−H stretching frequencies. Isolated alkenes have value 1640−1680 cm−1 and that of conjugated alkenes have 1620−1640 cm−1 frequencies.

The energy required to stretch a bond is more as compared to that of bending of a bond. C−H, N−H and O−H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms.

To determine: All the significant stretching frequencies above 1580 cm−1 for each given spectrums.

Answer 6

Chapter 12.12, Problem 12.6P

Interpretation Introduction

Interpretation: All the significant stretching frequencies above 1580 cm−1 for each given spectrums are to be interpreted.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic C−H stretching frequencies. Isolated alkenes have value 1640−1680 cm−1 and that of conjugated alkenes have 1620−1640 cm−1 frequencies.

The energy required to stretch a bond is more as compared to that of bending of a bond. C−H, N−H and O−H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms.

To determine: All the significant stretching frequencies above 1580 cm−1 for each given spectrums.

Answer 7

Chapter 12.12, Problem 12.6P

Interpretation Introduction

Interpretation: All the significant stretching frequencies above 1580 cm−1 for each given spectrums are to be interpreted.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic C−H stretching frequencies. Isolated alkenes have value 1640−1680 cm−1 and that of conjugated alkenes have 1620−1640 cm−1 frequencies.

The energy required to stretch a bond is more as compared to that of bending of a bond. C−H, N−H and O−H bonds have much higher stretching frequencies as compared to those of corresponding bonds to heavier atoms.

To determine: All the significant stretching frequencies above 1580 cm−1 for each given spectrums.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 12.3 - Complete the following conversion table. (cm1)...Ch. 12.5 - Which of the bonds shown in red are expected to...Ch. 12.7C - For each hydrocarbon spectrum, determine whether...Ch. 12.9A - Spectra are given for three compounds. Each...Ch. 12.10 - The infrared spectra for three compounds are...Ch. 12.12 - Prob. 12.6P Ch. 12.14B - Identify which of these four mass spectra indicate...Ch. 12.15A - Show the fragmentation that accounts for the...Ch. 12.15A - Show the fragmentations that give rise to the...Ch. 12.15B - Ethers are not easily differentiated by their...

Solution Summary: The author explains that IR spectrums are graphs for the energy absorbed by a molecule, based on the frequency or wavelength of light.

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Chapter 12 Solutions