Question

How to determine face shape whether compund is aromatic non aromatic or anti aromatic?

Answer 1

Rules for finding out aromaticity

It turns out that there isn’t one rule, there are actually three rules a compound must satisfy to be aromatic. They are: –

It must be a cyclic compound. In simple words, you should see a ring.

It must have a plane conjugated system. Big words. What it simply means is that resonance should be possible.

It must satisfy the 4n + 2 rule, also called the Huckel’s rule

Answer 2

Aromatic molecules have the following characteristics:

They are cyclic.

They are conjugated all around the ring. The easiest way to put it is this: every atom in the ring must be able to participate in resonance. ...

the molecule must have (4n+2) Pi electrons. ...

The molecule must be flat.