Predict the significant bands present in the IR spectrum of the given compound.

The following reaction shows the isomerization of alkene A to a more stable alkene B under acidic conditions:

How could IR spectroscopy be used to differentiate them?

Determine the characteristic IR absorption band that can be used to distinguish between the following pair of compounds.

Rank the compounds given below in order of decreasing wavenumber for the C=O absorption peak in the IR spectra:

Describe how the IR spectrum of the products would be used to differentiate them from the reactants in the following three reactions.

An unsaturated carboxylic acid (E)-but-2-enoic acid, has a broad peak at 3400cm^–1, and two sharp peaks at 1695 cm^–1 and 1650cm^–1 in the IR spectrum.
Explain and highlight the characteristics that make it evident that the acid is unsaturated and conjugated.

Determine the Infrared peaks that correspond to each of the following four compounds and explain how these peaks are related to the structure of each compound.

a. Medium peak at 2900 cm^-1, and a strong peak at 1715 cm^-1.

b. Medium peak at 3000cm^-1, a weak peak at 2250 cm^-1, and a weak overtone at 1600 cm^-1

c. Strong, broad 3000 cm^-1, a strong peak at 1690 cm^-1, and a weak peak at 1675 cm^-1

d. Strong, broad 3200 cm^-1, medium peak at 2900 cm^-1, and a weak overtone at 1600 cm^-1