3.0 Physical Properties

  Amines

• There is a intermolecular association in primary and secondary amines due to hydrogen bonding between nitrogen of one and hydrogen of another molecule which is more in primary amines than in secondary amines as there are two hydrogen atoms available for hydrogen bond formation in it.

• Tertiary amines do not have intermolecular association due to the absence of hydrogen atom available for hydrogen bond formation. Therefore, the order of boiling points of isomeric amines is as follows: $$Primary\ Amines\ >\ Secondary\ Amines\ >\ Tertiary\ Amines$$