1
$\begingroup$

This question already has an answer here:

Why is the first compound aromatic and the second compound non-aromatic?

In the first compound, the left side of the ring is aromatic but the right side isn't.
Second compound satisfies all the conditions of aromaticity but why is it non-aromatic?

enter image description here

$\endgroup$

marked as duplicate by Mithoron, Tyberius, airhuff, pentavalentcarbon, Todd Minehardt Feb 26 '18 at 23:51

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.