Question

question 6
what is the stretching frequency (in cm⁻¹) of the following carbonyl?
1775
1685
none of the above
1715
1745

Explanation:

Step1: Identify the carbon - oxygen double - bond type

The given compound is a benzoic acid, which has a carboxylic acid carbonyl group.

Step2: Recall the IR stretching frequency range for carboxylic acid carbonyls

Carboxylic acid carbonyls typically have IR stretching frequencies in the range of 1680 - 1725 cm⁻¹.

Answer:

1715