# Product of the reaction between hexane‐2,5‐dione and ammonium carbonate

Which of the following statement is INCORRECT?

(A) The product X has a five membered ring.
(B) The product X is aromatic.
(C) The degree of unsaturation of the product X is 3.
(D) The product X has a six membered ring.

Ammonium carbonate will probably lose a proton and one of the carbonyls may be protonated. But from here onwards I can't find any leads. Does the lone pair of other oxygen atom plays a role?

Usually the heat provided may lead to a cyclic structure, but I am not sure.

• Yes it is a cyclic compound. First think, what would happen to ammonium nitrate when it is heated? – Mathew Mahindaratne Nov 24 '19 at 5:57
• Ammonia gas , carbon dioxide and water is released...nitrogen lone pair will attack on carbonyl carbon and the oxygen will attack the other carbonyl carbon...is this assumption correct? But what happens next? – raj pattnaik Nov 24 '19 at 6:32

Heating $$\ce{(NH4)2CO3}$$ will generate $$\ce{NH3 + CO2 + H2O}.$$ Out of these, $$\ce{NH3}$$ will act as a nucleophile as it's the most nucleophilic of the products. Addition of $$\ce{NH3}$$ to the two ketones, followed by elimination of water molecules (due to the high temperature provided by ∆) will generate the final product as follows: