question 5\nwhat stretching frequencies (in cm⁻¹) are present in the structure below?\n1750\n1685\n1715
question 5\nwhat stretching frequencies (in cm⁻¹) are present in the structure below?\n1750\n1685\n1715
Answer
Explanation:
Step1: Identify the functional - group
The structure is an ester (aromatic - oxygen - carbonyl group).
Step2: Recall the carbon - oxygen double - bond ($C=O$) stretching frequency of esters
The $C = O$ stretching frequency of esters is typically in the range of 1735 - 1750 $cm^{-1}$ for saturated esters and around 1715 - 1730 $cm^{-1}$ for aromatic esters. In this case, it is an aromatic ester.
Answer:
1715