Saturday, January 26, 2008

IIT JEE Revision Amines - Physical Properties

1. Lower members of the family such as methylamine, dimethylamine, ethylamine are gases at ordinary temperatures and smell like ammonia.

The higher members are mostly liquids haivng fishy smell.

Amines are polar compounds and with the exception of tertiary amines can form intermolecular hydrogen bonds.

Amines hve higher boiling points than non-polar compounds of the same molecular mass.

Amines have lower boiling points than those of alcohols and carboxylic acids.

Primary amines have the highest boiling points and tertiary the lowest.

The lower amines are soluble in water.

Higher amines containing six or more carbon atoms are insoluble.

The amines are also soluble in less polar solvents like ether, alcohol or benzene etc.

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