Question

The phenomenon of Fermi resonance is observed in:

• A. \( \text{UV spectroscopy} \)
• B. \( \text{IR spectroscopy} \)
• C. \( \text{NMR spectroscopy} \)
• D. \( \text{ESR spectroscopy} \)

Hint:

Fermi resonance impacts IR spectral band shapes, requiring careful assignment in molecular characterization.

Answer 1

The Correct Option is B

Fermi resonance occurs in infrared (IR) spectroscopy when two closely spaced vibrational modes interact, resulting in enhanced intensity and frequency shifts. This effect modifies spectral interpretation, influencing band positions and molecular analysis.