Section-D: Comprehension Type
Comprehension (Reaction Mechanism-2)
Consider the following heterocyclic compound:
When the above compound is treated with HCl(aq), there occur step-wise protonation owing to different basic strength of three nitrogens 1, 2 and 3. The basic ionization constants (Kb) of the three nitrogens labeled 1, 2 and 3 respectively are and .
The increasing order of pKbs are