Question

when n,n - dimethylpentanamide (shown below) undergoes hydrolysis by base, what will be the amine formed?
select the correct answer below:
trimethylamine
dimethylamine
methylamine
none of the above

Explanation:

Amide hydrolysis by base breaks the \(C - N\) bond. In \(N,N -\)dimethylpentanamide, the amine part is \(-N(CH_3)_2\). When hydrolyzed, this part forms dimethylamine \((CH_3)_2NH\). Trimethylamine \((CH_3)_3N\) and methylamine \(CH_3NH_2\) do not match the amine - containing fragment from the given amide structure. So the amine formed is dimethylamine.

Answer:

B. dimethylamine