The "N" which does not contribute to the basicity for the compound is :
Show Hint
- N 7
- N 9
- N 1
- N 3
The Correct Option is B
Solution and Explanation
N9 carries H (N-H, pyrrole-type); its lone pair is delocalised into the aromatic pi system (needed for aromaticity of the imidazole ring), so it is not available and N9 does not contribute to basicity.
Answer: (2) N 9
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