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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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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