Question

The reaction shown is the Hofmann rearrangement of a cyclic imide. The starting material is a cyclic imide with a 5-membered ring containing one nitrogen and two carbonyl groups. The structure of the starting material is:

Answer 1

The starting material is a cyclic imide with a 5-membered ring containing one nitrogen and two carbonyl groups.

Answer 2

The question describes the Hofmann rearrangement of a cyclic imide and states that the starting material is a 5-membered ring with one nitrogen and two carbonyl groups. The provided text repeatedly attempts to draw this structure but fails to do so accurately, often resulting in a 4-membered ring or an incorrect representation of functional groups. The core information is the description of the starting material's structure and its role in the Hofmann rearrangement.