In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at
(a)$1660\,\mathrm{cm}^{-1}$
(b)$1700\,\mathrm{cm}^{-1}$
(c)$1730\,\mathrm{cm}^{-1}$
(d)$1770 \mathrm{cm}^{-1}$
Answer
Answer (as printed): D
Explanation
The carbonyl ester peaks appears at a higher frequency than for a normal ester because of the presence of strong electron withdrawing p-nitrophenoxy group.
Explanation as extracted from the printed page; notation may be imperfect.