Amines are having higher boiling points than hydrocarbons, as C-N bond in amines is more polar than a C-C bond in hydrocarbons. Due to the polar nature of amines it forms intermolecular H-bonds and exists as associated molecules.
- Amines have a greater tendency to form hydrogen bonding due to the presence of hydrogen and electronegative N atom. The intermolecular bonding increases and will require more energy to break the bonds.
- Primary amines have higher Hydrogen bonding than tertiary amines due to the steric hindrance of the bulky alkyl group.
- Mostly in primary amines two hydrogens are present that forms hydrogen bond compared to tertiary amine hence it has a higher boiling point