38E
Question
Which is stronger, the C=O bond in an ester () or the C=O bond in a saturated ketone ()? Explain
Step-by-Step Solution
Verified Answer
An ester C=O bond is stronger than a saturated ketone C=O bond.
1Energy
Energy is directly related to frequency and inversely related to wavelength. But in the case of wavenumber, energy is directly related to wavenumber.
2Fundamentals to decide stronger bond
As the wavenumber increases, the energy needed to cause IR absorption increases, indicating greater bond strength.
3Strength of ester and saturated ketone
The ester stretch occurs at higher wavenumbers and, therefore, higher energies. Since more energy is required to stretch that bond, the ester bond must be stronger.
Thus, an ester C=O bond is stronger than a saturated ketone C=O bond, respectively.
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