Question

question 20 what stretching frequencies (in cm⁻¹) are present in the structure below? 3300 2250

Explanation:

Step1: Identify the functional - group

The structure contains a nitrile group ($-C\equiv N$).

Step2: Recall stretching frequency of nitrile

The stretching frequency of a nitrile ($-C\equiv N$) group is around 2200 - 2250 $cm^{-1}$.

Answer:

2250