Which from following compounds is an example of secondary amine?

Step-by-step solution

Identifying the secondary amine requires examining nitrogen atom bonding patterns. Secondary amines feature two alkyl or aryl groups attached to the nitrogen atom. Ethane-1,2-diamine ( H ₂ N - CH ₂- CH ₂- NH ₂ ) contains primary amine groups, as each nitrogen bonds to one alkyl group and two hydrogens. Propan-2-amine ( CH ₃- CH ( NH ₂)- CH ₃ ) is also primary, with nitrogen bonded to one isopropyl group and two hydrogens. N-Methylmethanamine ( CH ₃- NH - CH ₃ ) matches the secondary amine definition: nitrogen bonde