Why do amines have higher boiling point than hydrocarbons?


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

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