Identify the nitrogen atom that does not cont | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The basicity of a nitrogen-containing compound depends on the availability of the lone pair of electrons for protonation. In the given structure (

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(A) The basicity of a nitrogen-containing compound depends on the availability of the lone pair of electrons for protonation. In the given structure (purine derivative): - Nitrogen $1$,$3$,and $4$ have lone pairs that are in $sp^2$ hybridized orbitals and are not involved in the aromatic sextet,making them available for protonation. - Nitrogen $2$ has a lone pair that is part of the aromatic system (it participates in the $6\pi$ electron delocalization required for aromaticity). - Since the lone pair on nitrogen $2$ is involved in resonance to maintain aromaticity,it is not available for donation to a proton. - Therefore,nitrogen $2$ does not contribute to the basicity of the compound.

Identify the nitrogen atom that does not contribute to the basicity of the compound shown in the structure.

Similar Questions

Which of the following bases is bicyclic?

The double-helical structure of $DNA$ is due to the action of . . . . . . .

What is the total number of $-OH$ groups present in a nucleoside involved in the formation of $DNA$?

Identify the nitrogenous base of nucleic acid from the following that has a double-ring structure.

$A$ nucleotide consists of

Vedclass Test Series

Exam Paper Generator

Online Exam Module