Question

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

Explanation:

Step1: Identify the carbonyl type

The given compound is an aromatic - ester. Aromatic esters have carbonyl stretching frequencies in the range of 1710 - 1730 $cm^{-1}$.

Step2: Select the appropriate value

Among the given options, 1715 $cm^{-1}$ falls within the typical range for an aromatic - ester carbonyl stretching frequency.

Answer:

1715