Question

question 5
what is the stretching frequency (in cm⁻¹) of the following carbonyl?
1715
none of the above
1775
1685

Explanation:

Step1: Identify the carbonyl type

The given compound is an amide with a carbon - oxygen double bond (C=O).

Step2: Recall amide C=O stretching frequency range

Amide C=O stretching frequencies are typically in the range of 1630 - 1700 $cm^{-1}$.

Step3: Select the appropriate option

Among the given options, 1685 $cm^{-1}$ falls within the amide C=O stretching frequency range.

Answer:

1685