Amines

of Amines . Classify the following amines as primary, secondary or tertiary: . (i) Write structures of different isomeric amines corresponding to the molecular formula, C H N. (ii) Write IUPAC names of all the isomers.

(iii) What type of isomerism is exhibited by different pairs of amines? The free amine can be obtained from the ammonium salt by treatment with a strong base: Ammonolysis has the disadvantage of yielding a mixture of primary, secondary and tertiary amines and also a quaternary ammonium salt. However, primary amine is obtained as a major product by taking large excess of ammonia. The order of reactivity of halides with amines is RI > RBr >RCl.

. Reduction of nitriles Nitriles on reduction with lithium aluminium hydride (LiAlH ) or catalytic hydrogenation produce primary amines. This reaction is used for ascent of amine series, i.e., for preparation of amines containing one carbon atom more than the starting amine. .

Reduction of amides The amides on reduction with lithium aluminium hydride yield amines.