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In FT-IR spectroscopy, the peak that appears at \(1750\ \mathrm{cm^{-1}}\) corresponds to __________.

Question and options

In FT-IR spectroscopy, the peak that appears at 1750 cm−11750\ \mathrm{cm^{-1}} corresponds to __________.
  1. –OH stretching
  2. –NH stretching
  3. –C=O stretching
  4. –C–H stretching

Answer and explanation

Correct answer: C - –C=O stretching
An absorption near 1750 cm−11750\ \mathrm{cm^{-1}} lies in the carbonyl region (esters about 1735-1750), i.e. C=O stretching. O-H and N-H stretches appear at 3200-3600 cm−1\mathrm{cm^{-1}}.

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