Dimethylamine(CH₃) ₂ NHhas a molecular weight of 45 and a boiling point of 7.4⁰C. Trimethylamine, (CH₃) ₃N, has a higher molecular weight (59) but a lower boiling point(3.5⁰C) . Explain this apparent discrepancy.

Amines can be of numerous kinds based on the carbon atoms connected to the nitrogen atom. Primary amine constitute amines where one of the hydrogen atoms is substituted with an alkyl or aryl group.

Amines comprise significant boiling points than amino acids. This is due to their ability to form hydrogen bonds because of the hydrogen and electronegative nitrogen atom.

Dimethylamine, (CH₃) ₂molecules are linked by intermolecular hydrogen bonding, so it has a greater boiling point. The hydrogen bonding takes more energy to separate the molecules from each other. Intermolecular hydrogen bonding is absent in trimethylamine molecules.

Trimethylamine,(CH₃) ₃molecules possess weak intermolecular bonds which are dipole-dipole interactions. These interactions are weaker than the hydrogen bonds. Since trimethylamine cannot hydrogen bond, it takes less energy to segregate these molecules from each other.