How many secondary amine structural isomers are possible for the molecular formula ? — Amines Chemistry Question

💡 Solution & Explanation

Secondary amines have the general formula $R-NH-R'$. For $C_4H_{11}N$, the alkyl groups must contain a total of 4 carbons. Possible combinations are Methyl and Propyl ($CH_3-NH-CH_2CH_2CH_3$, N-methyl-1-propanamine), Methyl and Isopropyl ($CH_3-NH-CH(CH_3)_2$, N-methyl-2-propanamine), and Ethyl and Ethyl ($C_2H_5-NH-C_2H_5$, N-ethylethanamine). This yields 3 structural isomers.