Question

Compare boiling point of isomeric alkyl amines.

• A. $1^{\circ }$ $>$ $2^{\circ }$ $>$ $3^{\circ }$
• B. $1^{\circ }$ $<$ $2^{\circ }$ $<$ $3^{\circ }$
• C. $2^{\circ }$ $<$ $1^{\circ }$ $<$ $3^{\circ }$
• D. $1^{\circ }$ $<$ $3^{\circ }$ $<$ $2^{\circ }$

Answer 1

The correct option is A $1^{\circ }$ $>$ $2^{\circ }$ $>$ $3^{\circ }$

Among isomeric amines, the primary and secondary amines have highest boiling point due to their large tendency to form hydrogen bonds whereas tertiary amines have the lowest boiling point because of their inability to form hydrogen bond due to the absence of hydrogen atom.
Therefore, the order of boiling piont of isomeric amine is an follows $1^{\circ }$ $>$ $2^{\circ }$ $>$ $3^{\circ }$ amines.