91Ó°ÊÓ

IR refers to the infrared region which deals with frequencies and absorbance. The product can be identified on the basis of change in the IR frequency.

a. The loss of the C=C will be visible in the IR by the disappearance of the peak at 1650 cm^-1

Reaction a

b. The loss of the O–H group will be visible in the IR by the disappearance of the peak at 3200–3600 ${\mathrm{cm}}^{-1}$and the appearance of the C=O at 1700 ${\mathrm{cm}}^{-1}$.

Reaction b

c. The loss of the C=C will be visible in the IR by the disappearance of the peak at 1650 ${\mathrm{cm}}^{-1}$and the appearance of the C=O at 1700 ${\mathrm{cm}}^{-1}$.

Reaction c

d. The loss of the O–H will be visible in the IR by the disappearance of the peak at 3200–3600 cm^-1.

Reaction d