Example 9.3

Example . Primary > Secondary > Tertiary Intermolecular hydrogen bonding in primary amines is shown in Fig. . . Boiling points of amines, alcohols and alkanes of almost the same molar mass are shown in Table . . Fig. . Intermolecular hydrogen bonding in primary amines Table . : Comparison of Boiling Points of Amines, Alcohols and Alkanes of Similar Molecular Masses Sl. No. Compound Molar mass b.p./K . n-C H NH . . (C H ) NH . . C H N(CH ) . . C H CH(CH ) . . n-C H OH . Difference in electronegativity between nitrogen and hydrogen atoms and the presence of unshared pair of electrons over the nitrogen atom makes amines reactive. The number of hydrogen atoms attached to nitrogen atom also decides the course of reaction of amines; that is why primary (–NH ), secondary H and tertiary amines differ in many reactions. Moreover, amines behave as nucleophiles due to the presence of unshared electron pair. Some of the reactions of amines are described below: . Basic character of amines Amines, being basic in nature, react with acids to form salts.