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Question: Answered & Verified by Expert
If an organic compound shows a streching (\(> \mathrm{C}=\mathrm{O}\)) frequency of \(1720 \mathrm{~cm}^{-1}\). The organic compound is ____.
ChemistryGeneral Organic ChemistryVITEEEVITEEE 2022
Options:
  • A An aliphatic aldehyde
  • B An \(\alpha, \beta\) unsaturated aldehyde
  • C A phenolic aldehyde
  • D An aromatic aldehyde
Solution:
1317 Upvotes Verified Answer
The correct answer is: An aliphatic aldehyde
An aliphatic aldehyde.
Generally \(\mathrm{H}-\mathrm{C}=\mathrm{O}\) streching frequency is about \(2830-2695 \mathrm{~cm}^{-1}\) but for aliphatic aldehyde is \(1740-1720 \mathrm{~cm}^{-1}\).

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