Question

Which functional group is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm\(^{-1}\) (strong), but does not have peaks at 3200-3650 cm\(^{-1}\) or 1630-1820 cm\(^{-1}\)?

• A. \( \text{Alcohol} \)
• B. \( \text{Aldehyde or ketone} \)
• C. \( \text{Ether} \)
• D. \( \text{Ester} \)

Hint:

Infrared spectroscopy is a powerful tool for identifying organic functional groups based on bond vibrations.

Answer 1

The Correct Option is C

Infrared spectroscopy detects functional groups based on characteristic absorption peaks. Ethers exhibit a strong absorption band at 1000-1250 cm\(^{-1}\), corresponding to C-O stretching, but lack peaks in the OH (3200-3650 cm\(^{-1}\)) and C=O (1630-1820 cm\(^{-1}\)) regions. Thus, the molecule likely contains an ether functional group.