Answer to Question #314207 in Organic Chemistry for Lethia

Question

Write the chemical reaction equation for Primary Aromatic Amine, Secondary Aromatic Amine and Tertiary Aromatic Amine.

Answer 1

Primary Amines: The amine is primary amine when an alkyl or Aryl group replaces one of three hydrogen atoms.

Aromatic amines react with nitrous acid (prepared in situ from NaNO₂ and a mineral acid such as HCl) at 273 - 278 K to form stable aromatic diazonium salts i.e., NaCl and H₂O.

2)

If any of the alpha carbons in an amine are aromatic, the amine is considered aromatic. Thus, N-methylaniline is a secondary aromatic amine. Recall from the last column (1) that organic nitrogen atoms form somewhat polar N-H bonds, and that these functional groups can form hydrogen bonds.

3)

Aliphatic tertiary amines form nitrite salts with HNO

2

HNO2 while aromatic tertiary amines undergo electrophilic substitution to form green coloured p-nitrosoamines.