ABC26OR0123 · Organic Spectroscopy

Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: IR · Exam: CSIR-NET DEC 2012 · Marks: 2 · Difficulty: Easy

In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at
(a)$1670 \mathrm{cm}^{-1}$
(b)$1700 \mathrm{cm}^{-1}$
(c)$1730 \mathrm{cm}^{-1}$
(d)$1760 \mathrm{cm}^{-1}$.
Answer
Answer (as printed): D
Explanation
The IR spectra give signal at 1765-1762 cm-1 if oxygen atom is conjugated with alkene or aromatic.

Explanation as extracted from the printed page; notation may be imperfect.

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