Q. 3 F4.3( 13 Votes )

Account for the f

Answer :

Diazonium salts: Diazonium salts have the general formula

(R/Ar—N2+Cl-) where R stands for the alkyl group and Ar stands for the aryl group. The structure is given below:

Formation of Diazonium salts:

Diazonium salt is obtained by treating aromatic amine(aniline) dissolved in dil. HCl with HNO2 at 273-278K (0° -5° C)

Diazonium salts of aromatic amines are more stable than those of aliphatic amines.


Aromatic amine form arenediazonium salts, which are stable for a short time in solution at low temperature(273-278K).The diazonium salts of aromatic amines are more stable due to the dispersal of the positive charge on the benzene ring (resonance) as shown below:

The aliphatic amines, on the other hand, form highly unstable alkane diazonium salt (R—N2+Cl-). They rapidly decompose even at low temperature(<272-278K) forming carbocation and nitrogen gas.

Hence, diazonium salts of aromatic amine are much more stable than aliphatic diazonium salts.

Note: Carbocation is an ion in which carbon atom consists of positive charge

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

(a) Write the reaChemistry - Board Papers