Which of the following will exhibit aromatic character?

Question

Which of the following will exhibit aromatic character? <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/c-rz5spnpf1femkkot.jpg" /> (A) I,III (B) III,IV (C) II,IV (D) II,III

Tardigrade Admin · Accepted Answer

Since in azulene (IV) two rings share a double bond, therefore, two electrons of this double bond can be counted towards each. As a result, each ring has 6π -electrons and hence azulene is aromatic. Pyrrole (II), the two double bonds + one lone pair of electrons on the N atom).

Q. Which of the following will exhibit aromatic character?

$I, III$

$III, I V$

$II, I V$

$II, III$

Since in azulene (IV) two rings share a double bond, therefore, two electrons of this double bond can be counted towards each. As a result, each ring has $6 π$ -electrons and hence azulene is aromatic. Pyrrole (II), the two double bonds + one lone pair of electrons on the $N$ atom).