Which of the following functional groups contains a polar π bond with no leaving group?

Question

Quizplus · Accepted Answer

Nitrile contains a polar π bond due to the difference in electronegativity between the carbon and nitrogen atoms. There is no leaving group associated with this functional group. The other functional groups listed (B-D) all contain a leaving group that can undergo some form of nucleophilic substitution or elimination reaction. The amide functional group (E) contains a polar π bond but also has a leaving group in the form of an amine.

Which of the Following Functional Groups Contains a Polar π