Question

QUESTION 2 1 pointsSave Answer Below are the IR spectrum of aldol on the left and the table for the list of stretching bonds on the right. What stretching band does vl correspond to? Choose one from the table Label Stretching bond Label Stretching bond O-H (ROH) CC aromatie G | C-H of aldehyde QUESTION 3 2 points Save Answer Use the same the IR spectrum of aldol and the table for the list of stretching bonds in Q2. What stretching bands does v3 correspond to? Choose all that apply QUESTION 4 1pointsSave Answer Use the same the IR spectrum of aldol and the table for the list of stretching bonds in Q2. What stretching band does v2 correspond to? Choose one from the table

Answer 1

2. The frequency 1 of the IR spectra belongs to the =C-H stretch i.e, sp^2 C-H stretch. The stretching values occur at 3054.6 and 3057 cm^-1 (more than 3000cm^-1)

Correct option is 4 i.e, D - C(sp^2)-H stretch.

3. The frequency 3 occurs in pairs at around 1589 cm^-1 and 1573cm^-1.This occurs due to the (C=C) stretch of the aromatic ring.

The correct option is 4 i.e, K - C=C aromatic

4. The second frequency occurs at around 1650 cm^-1. This is due to the (C=C) stretch.

Correct option is 3 i.e, J - C=C stretch