Which compound would be expected to show intense IR absorption at 2200 cm^-1?

Question

Quizplus · Accepted Answer

The intense IR absorption at 2200 cm-1 corresponds to the stretching frequency of the triple bond in a nitrile group (C≡N). PhCH2CN (B) contains a nitrile group and is therefore expected to show this absorption. But-1-ene (A) contains a C=C double bond, which typically absorbs around 1650 cm-1, and does not contain a nitrile group. The compound in option C is a cyclic ether and option D is an amide, neither of which contain a nitrile group.

Which Compound Would Be Expected to Show Intense IR Absorption